atomic absorption flame impure

atomic absorption flame impure, Total:200 items.

The international standard classification for "atomic absorption flame impure" includes: Copper and copper alloys , Chemical reagents , Chemical technology (Vocabularies) , Bases , Inorganic chemicals in general , Jewellery , Magnesium and magnesium alloys , Ferroalloys , Other products of the chemical industry .

The Chinese standard classification for "atomic absorption flame impure" includes: Heavy metals and their alloys analysis method , Chemical reagent in general , Basic standards and general methods , Inorganic acid and alkali , Inorganic chemicals in general , Artistic handicrafts , Light metals and their alloys , Steel and iron alloy analysis method , Basic standards and general methods , Metal physical property test method , Analysis methods for toxic substances in water .

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB/T 23768-2009 Inorganic chemicals for industrial use - General rules for flame atomic absorption spectrometry
GB/T 11200.3-2008 Text methods of high-purity sodium hydroxide - Part 3: Determination of calcium content - Flame atomic absorption method
GB/T 11907-1989 Water quality--Determination of silver--Flame atomic absorption spectrophotometric method
GB/T 13293.12-1991 Higher purity copper cathode. Determination of silver content. Separation and preconcentration with sulfhydryl cotton-flame atomic absorption spectrometric method
GB/T 4333.8-2022 Ferrosilicon—Determination of calcium content—Flame atomic absorption spectrometry
GB/T 21933.3-2008 Ferronickel - Determination of cobalt content - Flame atomic absorption spectrometric method
GB/T 13293.10-1991 Higher purity copper cathode－Determination of zinc content－Flame atomic absorption spectrometric method
GB/T 9723-1988 Chemical reagent-General rules for flame atomic absorption spectrometry
GB/T 9723-2007 Chemical Reagent - General Rule for Flame Atomic Absorption Spectrometry Analysis
GB/T 4470-1998 Analytical spectroscopic methods-Flame emission,atomic absorption and atomic fluorescence-Vocabulary
GB/T 19718-2005 Jewellery - Determiantion of nickel content - Method of flame atomic absorption spectrometry
GB/T 5687.10-2006 Ferrochromium - Determination of manganese content - Flame atomic absorption sspectrometric method
GB 9723-1988 General rules for chemical reagent flame atomic absorption spectrometry

Professional Standard - Hygiene

WS/T 95-1996 Urine - Determination of zinc - Flame atomic absorption spectrometric method
WS/T 93-1996 Serum - Determination of copper - Flame atomic absorption spectrometry method
WS/T 31-1996 Urine - Determination of cadmium - Flame atomic absorption spectrometric method

Taiwan Provincial Standard of the People's Republic of China

CNS 15123-2007 Paints and varnishes - Determination of total lead - Flame atomic absorption spectrometric method

Professional Standard - Non-ferrous Metal

YS/T 629.4-2007 Chemical analysis methods of high purity alumina Determination of potassium oxide Flame atomic absorption spectrophotometric method
YS/T 240.11-2024 Methods for chemical analysis of bismuth concentrate—Part 11: Determination of silver and gold contents —Flame atomic absorption spectrometric method and fire assaying-flame atomic absorption spectrometric method
YS/T 629.3-2007 Chemical analysis methods of high purity alumina Determination of sodium oxide Flame atomic absorption spectrophotometric method

Group Standards of the People's Republic of China

T/CSTM 00050-2018 Steel and iron—Determination of chromium content— Flame atomic absorption spectrometric method
T/CSTM 00772-2021 Silver—Determination of magnesium content —Flame atomic absorption spectrometric method
T/CSTM 00773-2021 Silver—Determination of zinc content —Flame atomic absorption spectrometric method
T/CSTM 00771-2021 Silver—Determination of gold content —Flame atomic absorption spectrometric method
T/CSTM 00770-2021 Silver—Determination of cadmium content —Flame atomic absorption spectrometric method
T/CSTM 01138-2022 Tungsten—Determination of calcium content—Flame atomic absorption spectrometric method

Professional Standard - Environmental Protection

HJ 957-2018 Water quality - Determination of cobalt - Flame atomic absorption spectrometry
HJ 1046-2019 Water quality—Determination of antimony—Flame atomic absorption spectrometry
HJ 1397-2024 Water quality-Determination of strontium-Flame atomic absorption spectrophotometry

Ministry of Ecology and Environment of the People's Replublic of China

GB 11912-1989 Water quality-Determination of nickel-Flame atomic absorption spectrometric method
GB 11907-1989 Water quality - Determination of silver-Flame atomic absorption spectrophotometric method

Professional Standard - Ferrous Metallurgy

YB/T 4533-2016 Ferrophosphorus. Determination of manganese content. Flame atomic absorption spectrometric method

American Society for Testing and Materials (ASTM)

ASTM STP 618-1985 Flameless Atomic Absorption Analysis: An Update
ASTM E663-86(1991)e1 Standard Practice for Flame Atomic Absorption Analysis

Danish Standards Foundation

DS 284:1988 Water quality - Chromium - Atomic absorption spectrometry in flame
DANSK DS/ISO 9658:1992 Steel - Determination of aluminium content - Flame atomic absorption spectrometric method
DS/EN 29658:1993 Steel. Determination of aluminium content. Flame atomic absorption spectrometric method
DS/ISO 7520:1993 Ferronickel - Determination of cobalt content - Flame atomic absorption spectrometric method
DS/EN 27520:1993 Ferronickel. Determination of cobalt content. Flame atomic absorption spectrometric method
DANSK DS/EN 10177:2019 Steels – Determination of calcium content – Flame atomic absorption spectrometric method (FAAS)
DS/ISO 9658:1993 Steel - Determination of aluminium content - Flame atomic absorption spectrometric method
DANSK DS/EN 10181:2019 Steels – Determination of lead content – Flame atomic absorption spectrometric method (FAAS)
DS/EN 29 658:1993 Steel - Determination of aluminium content - Flame atomic absorption spectrometric method

Indonesia Standards

SNI 13-6180-1999 Procedure for optimization of flame Atomic Absorption Spectrophotometer (AAS)

Standard Association of Australia （SAA）

AS 2134.1:1988 Recommended practice for chemical analysis by atomic absorption spectrometry - Flame atomic absorption spectrometry
AS 2135:1978 Glossary of terms used in flame atomic absorption spectroscopy
AS 1515.5:1987 Copper alloys - Determination of cadmium - Flame atomic absorption spectrometric method
AS 2769:1985 Waters - Determination of manganese - Flame atomic absorption spectrometric method
AS 2411:1980 Determination of lead in venous blood (flame atomic absorption spectrometric method)

Ente Nazionale Italiano di Unificazione

UNI 10553:1996 Water intended for human consumption. Determination of lead. Flameless atomic absorption spectrometric method using a graphite furnace.
UNI EN ISO 9658:2025 Steel - Determination of aluminium content - Flame atomic absorption spectrometric method
UNI ISO 1776:1997 Glass. Resistance to attack by hydrochloric acid at 100 ¡C. Flame emission or flame atomic absorption spectrometric method.

Association Francaise de Normalisation

NF EN 29658:1992 Steels - Determination of aluminum - Flame atomic absorption spectrometry method
NF A20-602*NF ISO 4693:1987 Iron ores. Determination of copper content. Flame atomic absorption spectrometric method.
NF EN 27520:1992 Ferro-nickel - Determination of cobalt - Flame atomic absorption spectrometry method
NF A08-364*NF EN 29658:1992 Steel. Determination of aluminium content. Flame atomic absorption spectrometric method.
NF ISO 4693:1987 Iron ores - Determination of copper - Flame atomic absorption spectrometry method
T01-040:1982 Analytical spectroscopic methods. Flame emission, atomic absorption and atomic fluorescence. Vocabulary.
NF A10-607*NF EN 27520:1992 Ferronickel. Determination of cobalt content. Flame atomic absorption spectrometric method.
NF EN ISO 9658:2024 Steel - Determination of aluminium content - Flame atomic absorption spectrometric method
NF A06-596*NF EN ISO 11652:2022 Steel and iron - Determination of cobalt content - Flame atomic absorption spectrometric method
NF EN ISO 9647:2022 Steels - Determination of vanadium contents - Flame atomic absorption spectrometry (SAAF) method
NF A08-364*NF EN ISO 9658:2024 Steel - Determination of aluminium content - Flame atomic absorption spectrometric method
NF A08-344*NF EN ISO 9647:2022 Steel - Determination of vanadium content - Flame atomic absorption spectrometric method (FAAS)
NF EN ISO 10700:1995 Steels and cast irons - Determination of manganese - Flame atomic absorption spectrometry method

Polski Komitet Normalizacyjny (PKN)

PN Z04367-2020-11 P Air purity protection -- Determination zinc dichloride in workplaces by flame atomic absorption spectrometry
PN Z04172-03-1989 Air purity protection ests for selenium etermination of selenium in work laces by flame atomie absorption pectrometry
PN Z04066-04-1990 Air purity protection Tests for iron and iron compounds Determination of ferric chloride and soluble iron salts in work places by flame atomie absorption spectrometry
PN-EN 10181-2019-07 P Steels -- Determination of lead content -- Flame atomic absorption spectrometric method (FAAS)

Korean Agency for Technology and Standards (KATS)

KS M ISO 6955:2011 Analytical spectroscopic methods-Flame emission,atomic absorption, and atomic fluorescence-Vocabulary
KS M ISO 6955-2016(2021) Analytical spectroscopic methods－Flame emission,atomic absorption, and atomic fluorescence－Vocabulary
KS M ISO 6955:2016 Analytical spectroscopic methods－Flame emission,atomic absorption, and atomic fluorescence－Vocabulary
KS M ISO 6955-2016 Analytical spectroscopic methods－Flame emission,atomic absorption, and atomic fluorescence－Vocabulary
KS E ISO 11534-2022 Iron ores — Determination of tin — Flame atomic absorption spectrometric method
KS E ISO 10204:2022 Iron ores — Determination of magnesium — Flame atomic absorption spectrometric method
KS M ISO 6955-2021 Analytical spectroscopic methods－Flame emission,atomic absorption, and atomic fluorescence－Vocabulary
KS E ISO 15633-2010(2020) Iron ores－Determination of nickel－Flame atomic absorption spectrometric method
KS E ISO 15633-2020 Iron ores－Determination of nickel－Flame atomic absorption spectrometric method
KS E ISO 15633:2010 Iron ores－Determination of nickel－Flame atomic absorption spectrometric method
KS D ISO 9658-2022 Steel－Determination of aluminium content－Flame atomic absorption spectrometric method
KS E ISO 11534:2022 Iron ores — Determination of tin — Flame atomic absorption spectrometric method
KS E ISO 10203-2022 Iron ores — Determination of calcium — Flame atomic absorption spectrometric method
KS E ISO 13313-2022 Iron ores — Determination of sodium — Flame atomic absorption spectrometric method
KS D ISO 9658:2002 Steel－Determination of aluminium content－Flame atomic absorption spectrometric method
KS E ISO 10203:2022 Iron ores — Determination of calcium — Flame atomic absorption spectrometric method
KS E ISO 13313:2022 Iron ores — Determination of sodium — Flame atomic absorption spectrometric method
KS E ISO 11533-2011(2016) Iron ores－Determination of cobalt－Flame atomic absorption spectrometric method
KS E ISO 10204-2022 Iron ores — Determination of magnesium — Flame atomic absorption spectrometric method
KS D ISO 10138:2002 Steel and iron－Determination of chromium content－Flame atomic absorption spectrometric method
KS D ISO 9658-2002(2022) Steel－Determination of aluminium content－Flame atomic absorption spectrometric method
KS D ISO 9647-2002(2017) Steel and iron — Determination of vanadium content — Flame atomic absorption spectrometric method
KS M ISO 3707-2012 Phosphoric acid for industrial use－Determination of calcium content－Flame atomic absorption method
KS E ISO 12740-2021 Lead sulfide concentrates — Determination of silver and gold contents — Fire assay and flame atomic absorption spectrometric method using scorification or cupellation
KS D ISO 10700-2023 Steel and iron — Determination of manganese content — Flame atomic absorption spectrometric method
KS D ISO 5194-2001(2016) Aluminium alloys－Determination of zinc－Flame atomic absorption spectrometric method
KS D ISO 10138-2022 Steel and iron－Determination of chromium content－Flame atomic absorption spectrometric method
KS M ISO 9668-2013 Pulps－Determination of magnesium content－Flame atomic absorption spectrometric method
KS E ISO 10203:2007 Iron ores－Determination of calcium－Flame atomic absorption spectrometric method
KS D ISO 9647-2022 Steel — Determination of vanadium content — Flame atomic absorption spectrometric method(FAAS)
KS M ISO 9668:2007 Pulps-Determination of magnesium content-Flame atomic absorption spectrometric method
KS M ISO 9668-2007(2012) Pulps－Determination of magnesium content－Flame atomic absorption spectrometric method
KS D ISO 4139-2002(2017) Metallic and other non-organic coatings－Measurement of coating thicknesses－Fizeau multiple-beam interferometry method
KS E ISO 10204:2007 Iron ores－Determination of magnesium－Flame atomic absorption spectrometric method

Czech Standards Institute (UNMZ)

CSN 42 0672-2-1993 Chemical analysis of non-ferrous metals and alloys. Aluminum and aluminum alloys. Determination of manganese by the photometric method and atomic absorption method
CSN 42 0672-1-1993 Chemical analysis of non-ferrous metals and alloys. Aluminum and aluminum alloys. Determination of iron by the photometric method and atomic absorption method
CSN 42 0635 Cast.15-1987 Chemical analysis of non-ferrous metals and alloys. Lead. Determination of sodium by the atomic absorption method and flame-photometric method
CSN EN 29658-1994 Steel - Determination of aluminium content - Flame atomic spectrometric method
CSN 42 0672-8-1993 Aluminium alloys. Determination of zirconium by the flame atomic absorption spectrometric method

International Organization for Standardization (ISO)

ISO 11533:2009 Iron ores - Determination of cobalt - Flame atomic absorption spectrometric method
ISO 13312:2006 Iron ores - Determination of potassium - Flame atomic absorption spectrometric method
ISO 13313:2006 Iron ores - Determination of sodium - Flame atomic absorption spectrometric method
ISO 9658:1990 Steel; determination of aluminium content; flame atomic absorption spectrometric method
ISO 15633:2017 Iron ores — Determination of nickel — Flame atomic absorption spectrometric method
ISO 10204:2017 Iron ores - Determination of magnesium - Flame atomic absorption spectrometric method
ISO 10204:2015 Iron ores - Determination of magnesium - Flame atomic absorption spectrometric method
ISO/DIS 9658:2023 Steel — Determination of aluminium content — Flame atomic absorption spectrometric method
ISO 15633:2009 Iron ores - Determination of nickel - Flame atomic absorption spectrometric method
ISO 10203:2006 Iron ores - Determination of calcium - Flame atomic absorption spectrometric method
ISO/CD 9658:2023 Steel — Determination of aluminium content — Flame atomic absorption spectrometric method
ISO 10204:2006 Iron ores - Determination of magnesium - Flame atomic absorption spectrometric method
ISO 13312:2017 Iron ores - Determination of potassium - Flame atomic absorption spectrometric method
ISO 13313:2017 Iron ores - Determination of sodium - Flame atomic absorption spectrometric method
ISO 10203:2017 Iron ores - Determination of calcium - Flame atomic absorption spectrometric method
ISO 10203:2015 Iron ores - Determination of calcium - Flame atomic absorption spectrometric method
ISO 15633:2015 Iron ores - Determination of nickel - Flame atomic absorption spectrometric method

GCC Standardization Organization

GSO ISO 10204:2013 Iron ores -- Determination of magnesium -- Flame atomic absorption spectrometric method
GSO ISO 10203:2013 Iron ores -- Determination of calcium -- Flame atomic absorption spectrometric method
GSO ISO 13312:2013 Iron ores -- Determination of potassium --- Flame atomic absorption spectrometric method
GSO ISO 15633:2015 Iron ores -- Determination of nickel -- Flame atomic absorption spectrometric method
GSO ISO 1776:2010 Glass -- Resistance to attack by hydrochloric acid at 100 degrees C -- Flame emission or flame atomic absorption spectrometric method
GSO ISO 4139:2013 Ferrosilicon – Determination of aluminium content – Flame atomic absorption spectrometric method
GSO ISO 11534:2013 Iron ores -- Determination of tin -- Flame atomic absorption spectrometric method
BH GSO ISO 9668:2024 Pulps -- Determination of magnesium content – Flame atomic absorption spectrometric method
GSO ISO 9668:2007 Pulps -- Determination of magnesium content – Flame atomic absorption spectrometric method
GSO ISO 11652:2014 Steel and iron -- Determination of cobalt content -- Flame atomic absorption spectrometric method
GSO ISO 10138:2015 Steel and iron -- Determination of chromium content -- Flame atomic absorption spectrometric method

Austrian Standards

ONORM ISO 5961:1987 Water quality; determination of cadmium; jlame atomic absorption spectrometric methods

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 1776:2010 Glass -- Resistance to attack by hydrochloric acid at 100 degrees C -- Flame emission or flame atomic absorption spectrometric method
OS GSO ISO 9658:2015 Steel -- Determination of aluminium content -- Flame atomic absorption spectrometric method
OS GSO ISO 15633:2015 Iron ores -- Determination of nickel -- Flame atomic absorption spectrometric method
OS GSO ISO 10204:2013 Iron ores -- Determination of magnesium -- Flame atomic absorption spectrometric method
OS GSO ISO 10700:2014 Steel and iron -- Determination of manganese content -- Flame atomic absorption spectrometric method
OS GSO ISO 10138:2015 Steel and iron -- Determination of chromium content -- Flame atomic absorption spectrometric method
OS GSO ISO 9647:2016 Steel and iron -- Determination of vanadium content -- Flame atomic absorption spectrometric method
OS GSO ISO 9668:2007 Pulps -- Determination of magnesium content – Flame atomic absorption spectrometric method

British Standards Institution (BSI)

BS ISO 15633:2015 Iron ores. Determination of nickel. Flame atomic absorption spectrometric method
BS EN ISO 9658:2024 Steel. Determination of aluminium content. Flame atomic absorption spectrometric method
BS ISO 5418-2:2006 Iron ores. Determination of copper - Flame atomic absorption spectrometric method
PD ISO/TR 4688-1:2017 Iron ores. Determination of aluminium. Flame atomic absorption spectrometric method
BS PD ISO/TR 4688-1:2017 Iron ores. Determination of aluminium-Flame atomic absorption spectrometric method
BS ISO 15633:2017 Iron ores. Determination of nickel. Flame atomic absorption spectrometric method
BS ISO 11534:2006 Iron ores. Determination of tin. Flame atomic absorption spectrometric method
BS ISO 15633:2009 Iron ores - Determination of nickel - Flame atomic absorption spectrometric method
BS ISO 10204:2017 Iron ores. Determination of magnesium. Flame atomic absorption spectrometric method
BS EN ISO 10700:1995(2000) Steel and iron — Determination of manganese content — Flame atomic absorption spectrometric method
BS ISO 10203:2017 Iron ores - Determination of calcium - Flame atomic absorption spectrometric method

Kingdom of Bahrain Testing and Metrology Directorate

BH GSO ISO 10203:2016 Iron ores -- Determination of calcium -- Flame atomic absorption spectrometric method
BH GSO ISO 15633:2017 Iron ores -- Determination of nickel -- Flame atomic absorption spectrometric method
BH GSO ISO 11533:2016 Iron ores -- Determination of cobalt -- Flame atomic absorption spectrometric method
BH GSO ISO 4139:2016 Ferrosilicon – Determination of aluminium content – Flame atomic absorption spectrometric method
BH GSO ISO 11652:2016 Steel and iron -- Determination of cobalt content -- Flame atomic absorption spectrometric method

Yugoslav Association for Standardization

JUS H.G8.190-1984 Reagents. di-Sodium tetraborate decahydrate. Determination od calcium content. Flame atomic absor- tion method
JUS H.G8.035-1981 Reagents. Sulphuric acid. Determination of copper content. Flame atomic absorption method
JUS H.G8.021-1980 Reagents. Hydrochloric acid. Determination ofcopper content. Flame atomic absorption method
JUS H.G8.020-1980 Reagents. Hydrochloric acid. Determination oflead content. Flame atomic absorption method
JUS H.G8.037-1981 Reagents. Sulphuric acid. Determination ofcadmium content. Flame atomic absorption method
JUS H.G8.036-1981 Reagents. Sulphuric acid. Determination ofzinc content. Flame atomic absorption method
JUS H.G8.034-1981 Reagents. Sulphuric acid. Determination of lead content. Flame atomic absorption method
JUS H.G8.214-1985 Reagents. Methanol. Determination ofiron content. Flame atomic absorption method
JUS H.G8.023-1980 Reagents. Hidrochloric acid. Determination ofcadmium content. Flame atomic absorption method
JUS H.G8.022-1980 Reagents. Hydrochloric acid. Determination ofzinc content. Flame atomic absorption method
JUS H.B8.353-1982 Boric acid for industrial u se. Determination of iron content Flame atornic absorption method
JUS H.B8.216-1984 Acetic acid for industrial use. Determination of copper contetn. Flarm atomic absorption method
JUS H.B8.633-1981 Sulphuric acid for industrial use. Determination of manganese content. Flame atomic absorption method

Netherlands Institute for Standardization

NEN 6423-1988 Water - Determination of sodium content by atomic absorption spectrometry (flame technique)
NEN 6424-1988 Water - Determination of potassium content by atomic absorption spectrometry (flame technique)
NEN 6452-1980 Water - Determination of cadmium content by atomic absorption spectrometry (flame technique)
NEN 6460-1981 Water - Determination of iron content by atomic absorption spectrometry (flame technique)
NEN 6461-1981 Water - Determination of manganese content by atomic absorption spectrometry (flame technique)
NEN 6446-1980 Water - Determination of calcium content by atomic absorption spectrometry (flame technique)
NEN 6448-1981 Water - Determination of chromium content by atomic absorption spectrometry (flame technique)

National Standardisation Body (ASRO)

STAS SR EN 27520-1994 Ferronickel. Determination of cobalt content. Flame atomic absorption spectrometric method
STAS SR 13367-1996 Sodium chloride. Determination of totai cadmium. Flame Atomic Absorption Spectrometric Method
STAS SR 13368-1996 Sodium chloride. Determination of total lead. Flame Atomic Absorption Spectrometric Method
STAS SR ISO 1776:1995 Glass — Resistance to attack by hydrochloric acid at 100°C. Flame emission or flame atomic absorption spectrometric method

Associação Brasileira de Normas Técnicas

ABNT NBR ISO 10203:2011 Iron ores - Determination of calcium - Flame atomic absorption spectrometric method

Gosstandart of Russia

GOST R ISO 4943-2010 Steel and iron. Determination of copper content. Flame atomic absorption spectrometric method
GOST R ISO 4940-2010 Steel and iron. Determination of nickel content. Flame atomic absorption spectrometric method

Swedish Institute for Standards

SS 28160:1993 Atomic absorption spectrometry, atomization in flame - Special guidelines for sodium and potassium

Spanish Association for Standardization (UNE)

UNE-EN ISO 11652:2023 Steel and iron - Determination of cobalt content - Flame atomic absorption spectrometric method (ISO 11652:1997)
UNE-EN ISO 9647:2023 Steel - Determination of vanadium content - Flame atomic absorption spectrometric method (FAAS) (ISO 9647:2020)
UNE 35056-1:1983 FERROSILICON. DETERMINATION OF ALUMINIUM CONTENT. FLAME ATOMIC ABSORPTION SPECTROMETRIC METHOD
UNE-EN 10181:2020 Steels - Determination of lead content - Flame atomic absorption spectrometric method (FAAS)

Standards Norway

NS-EN 10177:2019 Steels — Determination of calcium content — Flame atomic absorption spectrometric method (FAAS)
NS-EN 10181:2019 Steels — Determination of lead content — Flame atomic absorption spectrometric method (FAAS)

Finnish Standards Institute

SFS-EN 10177:2019 Steels. Determination of calcium content. Flame atomic absorption spectrometric method (FAAS)

German Institute for Standardization

DIN EN 10181:2019-10 Steels - Determination of lead content - Flame atomic absorption spectrometric method (FAAS); German version EN 10181:2019
DIN EN ISO 11652:2022-07 Steel and iron - Determination of cobalt content - Flame atomic absorption spectrometric method (ISO 11652:1997); German version EN ISO 11652:2022
DIN EN 10211:1996-02 Determination of titanium in steel and iron - Flame atomic absorption spectrometric method

European Committee for Standardization (CEN)

PREN 10177-2018 Steels - Determination of calcium content - Flame atomic absorption spectrometric method (FAAS)

Others: atomic absorption flame impure