Nitrogen isotopes

Nitrogen isotopes, Total:19 items.

The international standard classification for "Nitrogen isotopes" includes: Soil quality and pedology in general , Other products of the chemical industry .

The Chinese standard classification for "Nitrogen isotopes" includes: Soil and fertilizer in general , Industrial gas and chemical gas .

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海关总署

• SN/T 4675.32-2021 Method for the determination of nitrogen stable isotope ratio in wine for export

Group Standards of the People's Republic of China

• T/NAIA 0208-2023 Determination of Stable Isotope Ratio of Carbon and Nitrogen in Lycium Barbarum by Stable Isotope Analyzer Method

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

• GB/T 42490-2023 Soil quality—Determination of total content and isotope ratio of organic carbon and nitrogen of soil and biological samples—Stable isotope ratio mass spectrometry

Professional Standard - Chemical Industry

• HG/T 3789-2005 Stable isotope gaseous neon

Fujian Provincial Standard of the People's Republic of China

• DB35/T 2006-2021 Chemical conversion method for determination of nitrate nitrogen isotope in water

Inner Mongolia Provincial Standard of the People's Republic of China

• DB15/T 975-2016 Detection method of carbon and nitrogen isotope abundance ratio in beef and mutton of livestock products

RU-GOST R

• GOST 23644-1979 Gaseous nitrogen concentrated by stable isotope Nitrogen-15. Specifications

KR-KS

• KS K ISO 20921-2023 Textiles — Determination of stable nitrogen isotope ratio in cotton fibres

SCC

• DANSK DS/ISO 20921:2019 Textiles – Determination of stable nitrogen isotope ratio in cotton fibres
• DANSK DS/ISO 15604:2020 Fertilizers – Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
• DANSK DS/EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
• SN-CEN/TS 15604:2007 Fertilizers — Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

British Standards Institution (BSI)

• BS ISO 20921:2019 Textiles. Determination of stable nitrogen isotope ratio in cotton fibres

GOSTR

• GOST R ISO 15604-2019 Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

Spanish Association for Standardization (UNE)

• UNE-EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
• UNE-CEN/TS 15604:2008 EX Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

Danish Standards Foundation

• DS/EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

Lithuanian Standards Office

• LST EN 15604-2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

European Committee for Standardization (CEN)

• EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen

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