The purpose of adding hydrochloric acid to measure total nitrogen with alkaline potassium persulfate

The purpose of adding hydrochloric acid to measure total nitrogen with alkaline potassium persulfate, Total:45 items.

The international standard classification for "The purpose of adding hydrochloric acid to measure total nitrogen with alkaline potassium persulfate" includes: Water quality .

The Chinese standard classification for "The purpose of adding hydrochloric acid to measure total nitrogen with alkaline potassium persulfate" includes: Analysis methods for toxic substances in water .

Professional Standard - Environmental Protection

HJ 636-2012 Water quality. Determination of total nitrogen. Alkaline potassium persulfate digestion UV spectrophotometric method
HJ 634-2012 Soil-Determination of ammonium,nitrite and nitrate by extraction with potassium chloride solution -spectrophotometric methods

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

GB/T 7469-1987 Water quality--Determination of total mercury--Potassium permanganate-potassium persulfate decomposed method--Dithizone spectrophotometric method
GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method

中华人民共和国环境保护部

GB 7469-1987 Water quality-Determination of total mercury-potassium permanganats-potassium persalfate decomposed method-Dithizonc spectrophotometric method
GB 11894-1989 Water quility-Determination of total nitrogen UV spectrophotometric method-Alkaline potassium persulfate digestion method

Professional Standard - Water Conservancy

SL 83-1994 Determination of alkalinity、bicarbonate and carbonate (Acid titration method)

SCC

NS 4743:1993 Water analysis — Determination of total nitrogen after oxidation by peroxodisulphate
NS 4745:1991 Water analysis - Determination of the sum of nitrite nitrogen and nitrate nitrogen
DANSK DS/EN ISO 4047:1999 Leather - Determination of sulphated total ash and sulphated water-insoluble ash

NO-SN

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

YU-JUS

JUS H.G8.457-1991 Reagents. Potassium sulpbate. Determination of total nltrogen content. Colorlmetrlc metho?

PT-IPQ

NP 1229-1976 Potassium sulfate used in industry. Measurement of sulfate content
NP 1279-1976 Sodium silicate and potassium silicate. Measurement of total alkalinity

American Society for Testing and Materials (ASTM)

ASTM UOP953-13 Sulfate and Thiosulfate in Caustic Aqueous Solutions by Ion Chromatography
ASTM UOP953-97 Sulfate and Thiosulfate in Caustic Aqueous Solutions by Ion Chromatography

International Organization for Standardization (ISO)

ISO 2487:1973 Potassium sulphate for industrial use; Determination of sulphate content; Barium sulphate gravimetric method
ISO 23774:2023 Pulps — Kraft liquor — Determination of total, active and effective alkali using potentiometric titration
ISO 8799:2009 Surface active agents - Sulfated ethoxylated alcohols and alkylphenols - Determination of content of unsulfated matter
ISO 3200:1975 Sodium and potassium silicates for industrial use; Determination of sulphates content; Barium sulphate gravimetric method
ISO 11905-1:1997 Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate

Association Francaise de Normalisation

NF T20-364:1978 Potassium sulphate for industrial use. Determination of sulphate content.baryum sulphate gravimetric method.
NF T20-295:1968 CHEMICAL ANALYSIS OF SULPHURIC ACID AND OLEUM. DETERMINATION OF TOTAL NITROGEN.
NF EN ISO 4047:1999 Cuir - Dosage des cendres sulfatées totales et des cendres sulfatées insolubles dans l'eau
NF G52-230*NF EN ISO 4047:1999 Leather. Determination of sulphated total ash and sulphated water-insoluble ash.

FI-SFS

SFS 3603-1976 Sulfides, sulfites and sulfates in alkaline white liquor and green liquor
SFS 3609-1976 Nitrogen from sulfite residue

BE-NBN

NBN T 03-209-1980 Potassium sulphate for industrial use - Determination of sulphate content - Barium sulphate gravimetrie method
NBN T 03-241-1980 Sodium and potassium silicates for industrial use - Determination of sulphates content - Barium sulphate gravimetrie method
NBN T 03-189-1980 Potassium hydroxide for industrial use - Determination of sulphate content - Barium sulphate gravimetrie method

RO-ASRO

SR ISO 4047:1995 Leather. Determination of sulphated total ash and sulphated water - insoluble ash

Universal Oil Products Company (UOP)

UOP 953-2013 Sulfate and Thiosulfate in Caustic Aqueous Solutions by Ion Chromatography

Japanese Industrial Standards Committee (JISC)

JIS K 6558-3:2016 Leather -- Determination of sulphated total ash, sulphated water-insoluble ash, and total ash

British Standards Institution (BSI)

BS EN ISO 11905-1:1998 Water quality. Determination of nitrogen.. Method using oxidative digestion with peroxodisulfate
BS EN ISO 4047:1998 Leather - Determination of sulphated total ash and sulphated water-insoluble ash

Danish Standards Foundation

DS/EN ISO 4047:2001 Leather - Determination of sulphated total ash and sulphated water-insoluble ash

KR-KS

KS M ISO 4047-2023 Leather — Determination of sulphated total ash and sulphated water-insoluble ash

Korean Agency for Technology and Standards (KATS)

KS M ISO 4047-2007(2022) Leather－Determination of sulphated total ash and sulphated water-insoluble ash
KS I ISO 11905-1:2008 Water quality-Determination of nitrogen-Part 1:Method using oxidative digestion with peroxodisulfate

SE-SIS

SIS SS 02 81 27-1984 Determination of total phosphorous in water - Digestion with peroxodisulphate

German Institute for Standardization

DIN EN ISO 11905-1:1998 Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate (ISO 11905-1:1997); German version EN ISO 11905-1:1998

TR-TSE

TS 2226-1976 SODIUM AND POTASSIUM SILICATES FOR INDUSTRIAL USE DETERMINATION OF SULPHATES CONTENT BARIUM SULPHATE GRAVIMETRIC METHOD

GSO

GSO ISO 6122:2015 Surface active agents -- Technical alkane sulphonates -- Determination of total alkane sulphonates content

Standard Association of Australia （SAA）

AS 4969.14:2009 Analysis of Acid Sulfate Soils Dry Sample Test Method Calculating the Acidogenic Potential of Acid Sulfate Soils Using the Acid-Base Accounting Method

Others: