Total nitrogen analysis method

Total nitrogen analysis method, Total:191 items.

The international standard classification for "Total nitrogen analysis method" includes: Rubber , Metalliferous minerals , Fertilizers , Sensory analysis , Aluminium and aluminium alloys , Cadmium, cobalt and their alloys , Ferroalloys , Chemical reagents , Ferrous metals , Environmental testing , Abrasives , Aluminium , Materials for aerospace construction , Advanced ceramics , Materials for aluminium production , Chemical analysis of metals , Refractories .

The Chinese standard classification for "Total nitrogen analysis method" includes: Rubber products in general , Iron ore , Heavy metal ore , Basic standards and general methods on chemical fertilizers , Basic standards and general methods , Heavy metals and their alloys , Rare metals and their alloys analysis method , Steel and iron alloy analysis method , Chemical reagent in general , Chemical fertilizer and chemical soil conditioner , Material composition analysis instrument and environment detection instrument in general , Metallochemistry analysis method in general , Heavy metals and their alloys analysis method , Grinding material and apparatus , Water supply and draining instrument and equipment , Special ceramics , Basic standards and general methods , Carbon material , Petroleum geology exploration , Technical Management , Special refractory .

National Metrological Verification Regulations of the People's Republic of China

JJG 1094-2013 Water Quality On-line Analyzers of Total Phosphorus and Total Nitrogen

国家市场监督管理总局、中国国家标准化管理委员会

GB/T 40723-2021 Rubber—Determination the contents of total sulfur and total nitrogen — Automatic analyser method

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

GB/T 4324.6-1984 Methods for chemical analysis of tungsten - The ortho-phenanthroline photometric method for the determination of iron content
GB/T 4325.6-1984 Methods for chemical analysis of molybdenum;The ortho-phenanthroline photometric method for the determination of iron content
GB/T 11606.1-1989 The method of environmental test for analytical instruments--General
GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content
GB/T 2441.1-2008 Determination of urea - Part 1: Total nitrogen content
GB/T 4324.26-1984 Methods for chemical analysis of tungsten - The Nessler reagent photometric method for the determination of nitrogen content
GB 223.49-1985 Methods for chemical analysis of iron,steel and alloy--The extraction separation-chlorophosphonazo mA photometric method for the determination of rare earth elements
GB/T 8220.2-1998 Methods for chemical analysis bismuth--Determination of iron content--1, 10-Phenanthroline photometric method
GB/T 6730.24-1986 Methods for chemical analysis of iron ores; The arsenazo 3 photometric method for the determination of rare earth elements content
GB/T 3257.15-1999 Methods for chemical analysis of bauxite--Determination the total content of rare earth oxide--Tribromo-arsenazo photometric method
GB/T 15076.13-1994 Methods for chemical analysis of tantalum and niobium-Determination of nitrogen content in tantalum
GB/T 4325.15-1984 Methods for chemical analysis of molybdenum;The chlorophosphonazo 1 photometric method for the determination of magnesium content
GB/T 4325.26-1984 Methods for chemical analysis of molybdenum;The nessler reagent photometric method for the determination of nitrogen content
GB/T 10220-2012 Sensory analysis—Methodology—General guidance
GB/T 609-1988 Chemical reagent-General method for the determination of total nitrogen
GB/T 4324.15-1984 Methods for chemical analysis of tungsten--The chlorophosphonazo I photometric method for the determination of magnesium content
GB/T 20931.9-2007 Methods for chemical analysis of lithium—Determination of nitrogen content—Mercuric potassium iodide spectrophotometric method
GB/T 6987.24-2001 Aluminium and aluminium alloys. Determination of copper content. Tribromoarsenazo spectrophotometric method
GB/T 13580.1-1992 General princeptes for analytial methods of the wet precipitation
GB/T 14265-1993 rule of chemical analysis for hydrogen, oxygen, nitrogen, carbon and sulfur in metals materials
GB/T 5687.4-1985 Methods for chemical analysis of ferro-chromium; The neutralization titration method for the determination of nitrogen content
GB/T 10220-1988 Sensory analysis--Methodology--General guidance
GB/T 609-2006 Chemical Reagent - General Method for the Determination of Total Nitrogen
GB/T 223.49-1994 Methods for chemical analysis of iron, steel and alloy Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare earth content
GB/T 609-2018 Chemical reagent—General method for the determination of total nitrogen

Professional Standard - Commodity Inspection

SN/T 3097-2012 Determination of total nitrogen in fertilizers-Combustion

Military Standard of the People's Republic of China-General Armament Department

GJB 507-1988 Boron nitride chemical analysis method
GJB 770.303-1989 Test methods for gunpowder analysis: Determination of nitrogen content of nitrocellulose. Five-tube nitrogen meter method

Professional Standard - Machinery

JB/T 7994-2012 Superabrasive — Chemical analysis method for cubic boran nitricle
JB/T 7994-1999 Chemical analysis methods of cubic boron nitride

Jilin Provincial Standard of the People's Republic of China

DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)

Professional Standard - Aviation

HB/Z 5218.14-2004 Methods for chemical analysis of aluminium alloys-Part 14:Determination of the cerium subgroup of rare earth elements content by tribromoarsenazo spectrophtometric method
HB 5220.39-1995 Chemical Analysis Method of Superalloys PMBP Direct Extraction-ArsenazoⅢ Absorbance Spectrophotometry Determination of Total Rare Earth
HB 5218.14-1995 Aluminum Alloy Chemical Analysis Method Tribromoarsine Spectrophotometric Determination of Total Rare Earth in Cerium Group
HB 5220.39-2008 Methods for Chemical Analysis of Superalloys - Part 39: Determination of Total Rare Earth Content by Pmbp Direct Extraction-Arsenazo III Photometric Method

Professional Standard - Environmental Protection

HJ/T 102-2003 The technical requirement for water quality automatic ananlyzer of total nitrogen

Professional Standard - Building Materials

JC/T 2342-2015 Method for the quantitative phase analysis of silicon nitride

Professional Standard - Agriculture

GB 10220-1988 Sensory analysis - Methodology－General guidance
GB/T 609-2018(XG1-2024) Chemical Reagents General Method for Determination of Total Nitrogen
GB 609-1988 General method for the determination of total nitrogen content of chemical reagents

Professional Standard - Non-ferrous Metal

YS/T 536.2-2006 Bismuth Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 575.14-2007 Methods for chemical analysis of bauxite Part 14:Determination the total content of rare earth oxide Tribromo-arsenazo photometric method
YS/T 74.7-1994 Cadmium Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 575.14-2006 Methods for chemical analysis of bauxite -- Determination the total content of rare earth oxide -- Tribromo-arsenazo photometric method

Taiwan Provincial Standard of the People's Republic of China

CNS 12786-1990 Method of Chemical Analysis for Silicon Nitride Powders
CNS 10509-1983 Methods of Chemical Analysis for Nitrogen in Ferrochromium
CNS 188-1971 Method of Analysis for Calcium Cyanamide
CNS 3572-1973 Chemical Analysis of Natural Rubber (Nitrogen)

Group Standards of the People's Republic of China

T/QAS 071-2021 Determination of total nitrogen in brine Kjeldahl method
T/GRM 049-2022 Determination of Mercury in Crude Oil
T/HNNMIA 63-2023 Chemical analysis methods of amidoxime resins-Determination of nitrogen content-Elemental analysis

Hebei Provincial Standard of the People's Republic of China

DB13/T 1224-2010 Determination method of total nitrogen in organic chemical products

工业和信息化部

YS/T 1467.10-2021 Hafnium Chemical Analysis Methods Part 10: Determination of Oxygen and Nitrogen Amounts
YS/T 1179.3-2017 Chemical analysis methods of aluminum slag-Part 3:Determination of carbon，nitrogen-Element analysis method

Xinjiang Provincial Standard of the People's Republic of China

DB65/T 602.2-2001 The determinanation of hydrolyzable nitrogen in soil
DB65/T 602.4-2001 The determinanation of nitrate nitrogen in soil
DB65/T 602.3-2001 The determinanation of ammonium nitrogen in soil

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

GB/T 19143-2017 Analytical method of element for carbon,hydrogen,oxygen and nitrogen in rock organics
GB/T 14265-2017 General rule of chemical analysis for hydrogen, oxygen, nitrogen, carbon and sulfur in metallic materials

Professional Standard - Electron

SJ/T 10893-1996 General rules for chemical analysis of electronic glass

Professional Standard - Education

JY/T 0589.1-2020 General rules of analytical methods for thermal analysis Part 1:General principles

Professional Standard - Ferrous Metallurgy

YB/T 174.1-2000 Chemical analysis for silicon nitride bonded silicon carbide product. Determination of silicon nitride content. High pressure dissolve specimen method

Spanish Association for Standardization (UNE)

UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
UNE 77325:2003 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
UNE 34082:1976 ANALYSIS METHODS FOR CHOCOLATES. TOTAL FAT.
UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

British Standards Institution (BSI)

BS 5551-4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)
BS ISO 6658:2006 Sensory analysis - Methodology - General guidance
BS 4267-2:1988 Ammonium nitrate - Method for determination of total nitrogen content
BS 7755-3.7:1995 Soil quality. Chemical methods. Determination of total nitrogen. Modified Kjeldahl method
BS 4267-2:1988(1999) Ammonium nitrate — Part 2 : Method for determination of total nitrogen content
DD ISO/TS 12902:2002 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen. Instrumental methods
BS EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS 6986-4:1990 Analysis of instant tea. Method for determination of total ash
BS EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS EN 15750:2010 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

Japanese Industrial Standards Committee (JISC)

JIS K 0170-3:2019 Testing methods for water quality by flow analysis -- Part 3: Total nitrogen
JIS K 0170-3:2011 Testing methods for water quality by flow analysis -- Part 3: Total nitrogen
JIS G 1201:2022 Iron and steel -- General rules for analytical methods
JIS R 1640:2002 Methods for the quantitative phase analysis of silicon nitride
JIS G 1311-7:2012 Method for chemical analysis of ferromanganese -- Part 7: Determination of nitrogen content
JIS G 1313-6:2012 Method for chemical analysis of ferrochromium .Part 6: Determination of nitrogen content
JIS K 0102-2:2022 Testing methods for industrial water and industrial wastewater -- Part 2: Inorganic anions, ammonium ion, organic nitrogen, total nitrogen and total phosphorus

VN-TCVN

TCVN 6645-2000 Soil quality.Determination of total nitrogen content by dry combustion ("elemental analysis")
TCVN 305-2010 Steel and iron.Determination of nitrongen content.Methods of chemical analysis.

SCC

NS 4745:1991 Water analysis - Determination of the sum of nitrite nitrogen and nitrate nitrogen
BS 1121-39:1959 Methods for the analysis of iron and steel. Nitrogen in iron and steel
AWWA ACE58255 Analytical Methods for Organic-N in Water Sources
BS 1121-39:1967 Methods for the analysis of iron and steel. Nitrogen in iron and steel. Volumetric
NS 4743:1993 Water analysis — Determination of total nitrogen after oxidation by peroxodisulphate
NS-EN 15750:2009 Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
SN-CEN/TS 15750:2008 Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS DD CEN/TS 15750:2008 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
DANSK DS/EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
AENOR UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
DIN EN 15750 E:2009 Draft Document - Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version prEN 15750:2009
DANSK DS/ISO 29441:2010 Water quality - Determination of total nitrogen after UV digestion - Method using flow analysis (CFA and FIA) and spectrometric detection
BS 3917-2:1965 Methods for the analysis of manganese ores-Total manganese
DANSK DS/EN ISO 13395:1997 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS 5551-4.1.5:1993 Fertilizers. Chemical analysis. Determination of nitrogen.-Method for determination of urea nitrogen content (gravimetric method using xanthydrol)
BS 684-0:1982 Methods of analysis of fats and fatty oils-General introduction

NL-NEN

NEN 6646-1990 Water - Photometric determination of the content of ammonium nitrogen and of the sum of the contents of ammoniacal and organically bound nitrogen according to Kjeldahl by continuous flow analysis

Association Francaise de Normalisation

NF X31-418*NF ISO 13878:1998 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
NF EN ISO 21814:2022 Technical ceramics - Methods for chemical analysis of aluminum nitride powders
NF EN ISO 17947:2023 Technical ceramics - Methods for the chemical analysis of fine silicon nitride powders
NF T20-295:1968 CHEMICAL ANALYSIS OF SULPHURIC ACID AND OLEUM. DETERMINATION OF TOTAL NITROGEN.
NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
NF ISO 13878:1998 Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis")

Korean Agency for Technology and Standards (KATS)

KS L 9310-2017(2022) Methods for chemical analysis of aluminum nitride powders
KS I ISO 13878:2009 Soil quality－Determination of total nitrogen content by dry combustion(“elemental analysis”)
KS I 2203-2011 Methods for determination of oxides of nitrogen in flue gases
KS L 9310-2017 Methods for chemical analysis of aluminum nitride powders
KS L 9310-2022 Methods for chemical analysis of aluminum nitride powders
KS Q ISO 6658-2009(2019) Sensory analysis－Methodology－General guidance
KS E 3013-2001(2006) METHODS FOR DETERMINATION OF TOTAL IRON CONTENT IN IRON ORES
KS Q ISO 6658:2009 Sensory analysis-Methodology-General guidance
KS L 3318-1988 METHODS FOR CHEMICAL ANALYSIS OF FINE SILICON NITRIDE POWDERS FOR FINE CERAMICS
KS L 3318-1998 METHODS FOR CHEMICAL ANALYSIS OF FINE SILICON NITRIDE POWDERS FOR FINE CERAMICS
KS I ISO 13395-2008(2018) Water quality－Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
KS D 2573-2005 Methods for determination of nitrogen in zirconium and zirconium alloys
KS M 0027-1993 General Rules for Analytical Methods in Gas Chromatography Mass Spectrometry
KS D 1910-6-2023 Method for chemical analysis of ferrochromium — Part 6: Determination of nitrogen content
KS L 1613-2023 Methods for chemical analysis of fine silicon nitride powders for fine ceramics
KS L 3318-2001 METHODS FOR CHEMICAL ANALYSIS OF FINE SILICON NITRIDE POWDERS FOR FINE CERAMICS
KS M ISO 15672-2022 Rubber and rubber additives－Determination of total nitrogen content using an automatic analyser

GOSTR

GOST R 58596-2019 Soils. Methods for determination of total nitrogen

KR-KS

KS I ISO 13878-2009(2023) Soil quality－Determination of total nitrogen content by dry combustion(“elemental analysis”)

GSO

BH GSO ISO 13878:2016 Soil quality -- Determination of total nitrogen content by dry combustion ("elemental analysis")
OS GSO ISO 29441:2013 Water quality -- Determination of total nitrogen after UV digestion -- Method using flow analysis (CFA and FIA) and spectrometric detection
GSO ISO 29441:2013 Water quality -- Determination of total nitrogen after UV digestion -- Method using flow analysis (CFA and FIA) and spectrometric detection
GSO ISO 15672:2015 Rubber and rubber additives -- Determination of total nitrogen content using an automatic analyser
OS GSO ISO 15672:2015 Rubber and rubber additives -- Determination of total nitrogen content using an automatic analyser

International Organization for Standardization (ISO)

ISO 13878:1998 Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis")
ISO 6658:1985 Sensory analysis; Methodology; General guidance
ISO 6658:2005 Sensory analysis - Methodology - General guidance
ISO 6658:2017 Sensory analysis - Methodology - General guidance

NO-SN

NS 4745-1991 Water analysis - Determination of the sum of nitrite nitrogen and nitrate nitrogen
NS 4743-1993 Water analysis. Determination of total nitrogen after oxidation with peroxodisulphate

American Society for Testing and Materials (ASTM)

ASTM D3590-02 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-11 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-17 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D2973-71(1998) Standard Test Method for Total Nitrogen in Peat Materials
ASTM D8001-16 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D2973-71(2004) Standard Test Method for Total Nitrogen in Peat Materials
ASTM D2973-22 Standard Test Method for Total Nitrogen in Peat Materials
ASTM D8001-16e1 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D2973-10 Standard Test Method for Total Nitrogen in Peat Materials
ASTM D2973-16 Standard Test Method for Total Nitrogen in Peat Materials
ASTM D2973-10e1 Standard Test Method for Total Nitrogen in Peat Materials
ASTM D2973-23 Standard Test Method for Total Nitrogen in Peat Materials
ASTM D3179-02 Standard Test Methods for Nitrogen in the Analysis Sample of Coal and Coke
ASTM D3179-89(2002) Standard Test Methods for Nitrogen in the Analysis Sample of Coal and Coke
ASTM D3179-89(1997)e1 Standard Test Methods for Nitrogen in the Analysis Sample of Coal and Coke
ASTM D3179-02e1 Standard Test Methods for Nitrogen in the Analysis Sample of Coal and Coke
ASTM D3179-89(1997) Standard Test Methods for Nitrogen in the Analysis Sample of Coal and Coke

Indonesia Standards

SNI 4146-2013 Method for determination of total nitrogen content in sediment by Kjeldahl titration method
SNI 19-1501-1989 Test methods for total nitrogen oxide in air

German Institute for Standardization

DIN ISO 13878:1998 Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis") (ISO 13878:1998)
DIN EN 15750:2010-02 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version EN 15750:2009
DIN CEN/TS 15750:2008 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version CEN/TS 15750:2008

Standard Association of Australia （SAA）

AS 1871.11:1976 List of methods for examination of waters Nitrogen (total Kjeldahl incl. ammoniacal)
AS K1.12:1967 Methods for the analysis of iron and steel, Part 12: Nitrogen in steel: volumetric
AS K1.12:1959 Methods for the analysis of iron and steel, Part 12: Method for the determination of nitrogen in steel
AS 1050.12:1983/Amdt 1:1984 Steel analysis methods Determination of nitrogen in steel (steam distillation titration method)
AS 1050.12:1983(R2016) Steel analysis methods Determination of nitrogen in steel (steam distillation titration method)

VDI - Verein Deutscher Ingenieure

VDI 2456 Blatt 10-1990 Gaseous emission measurement; analytical determination of the sum of nitrogen monoxide and nitrogen dioxide; dimethylphenol method
VDI 2456 Blatt 10-1989 Gaseous emission measurement; analytical determination of the sum of nitrogen monoxide and nitrogen dioxide; dimethylphenol method

AT-ON

ONORM L 1095-2002 Chemical analyses of soils - Determination of total nitrogen by dry combustion
ONORM L 1091-1999 Chemical analysis of soils - Determination of inorganic nitrogen Nmin-method

South African Bureau of Standard

SANS 5922:1978 Total moisture content of coal (nitrogen-oven method)

RU-GOST R

GOST 10671.4-2016 Reagents. Methods for determination of total nitrogen impurity
GOST 26107-1984 Soils. Methods for determination of total nitrogen

RO-ASRO

STAS SR 13300-5-1994 `Starches. Methods of analysis. Total ash determination
STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method

TR-TSE

TS 2428-1976 METHODS FOR THE CHEMICAL ANALYSIS OF IRON AND STEELS DETERMINATION OF NITROGEN CONTENT
TS 602-1972 CHEMICAL ANALYSIS OF STEELS DETERMINATION OF TOTAL SILICON (GRAVIMETRIC METHOD)
TS 3651-1981 METHODS FOR THE ANALYSIS OF WATER — DETERMINATION OF IRON CONTENT — 1,10 Phenanthroline Spectrophotometry Method

BE-NBN

NBN T 91-255-1976 Water analysis methods - Determination of the ammoniacal and organic nitrogen - (Kjeldahl nitrogen)

Danish Standards Foundation

DS/ISO 29441:2010 Water quality - Determination of total nitrogen after UV digestion - Method using flow analysis (CFA and FIA) and spectrometric detection
DS/EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
DS/EN ISO 13395:1997 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection

Lithuanian Standards Office

LST EN 15750-2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

CZ-CSN

CSN 65 4836-1983 Minerál fertilizers Methode for determination of total nitrogen content
CSN ON 65 4510-1962 Analysis of industrial degassing. Nitrogen determination

European Committee for Standardization (CEN)

PD CEN/TS 15750:2008 Fertilizers - Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

YU-JUS

JUS B.H8.320-1988 Methods of analysis of coal and coke. Determination of nitrogen ccmtent - Makro Kjeldahl nethod

PL-PKN

PN C04576 ArkusZ12-1973 Water and waste water Tests for nitrogenDetermination of total nitrogen of Kjeldahl

PH-BPS

PTS 98-1970 Standardization of the Method of Test for the Determination of Total Nitrogen Content.Devarda Method