GB/T 12687.4-1990 Replaced National standards

GB/T 12687.4-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of mercury content—Flame atomic absorption spectrophotometric method

Publish Date: 1990-12-30 Implement Date: 1992-01-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 12687.4-1990

Standard Type: National standards

Standard Status: Replaced

is_force_gb: no

CCS Name: Analysis methods for rare metals and their alloys

ICS Name: Fertilizer

Publish Date: 1990-12-30

Implement Date: 1992-01-01

Publisher: The National Technical Supervision Bureau

Technical Committee: Beijing Nonferrous Metals Research Institute

Pages: 4 pages

Development Information

Drafting Units:

Beijing Nonferrous Metals Research Institute

Drafting Persons:

Zheng Yongzhang

Word Count: 6 Thousand words Pages: 4 pages

Same series standard

GB/T 12687.1-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of total rare earth oxide content—Gravimetric method GB/T 12687.2-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of chlorine content—Mercurimetric method GB/T 12687.3-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of arsenic content—Hydride generation flame atomic absorption spectrophotometric method GB/T 12687.5-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of chrome content-sys—Diphenyl carbazide spectrophotometric method GB/T 12687.6-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of lead and cadmium content—Flame atomic absorption spectrophotometric method GB/T 12687.7-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination of thorum content—Spectrometric method with Cl-TBP levextred resin separation GB/T 12687.8-1990 Chemical analysis of nitrate of rare earth for agriculture—Determination for the water insoluble matter content—Gravimetric method

Superseded by the following standards

GB/T 12687.1-2010 Chemical analysis methods of rare earth nitrate for growth regulator for plant—Part 1:Determination of arsenic,mercury,lead,cadmium and chromium contents—Inductively coupled plasma mass spectrometry method

Referenced Standards

GB 1.4 GB/T 1467-2008 Method for chemical analysis of metallurgy product—General rules and regulations GB/T 7728-2021 Chemical analysis of metallurgical products—General rule for flame atomic absorption spectrometric methods

Related Standards

GB/T 3598-1983 Abolished

GB/T 3598-1983 Fertilizers—Determination of urea nitrogen content—Urease method

Publish Date: 1983-04-11

GB 8569-1997 Replaced

GB 8569-1997 Packing of solid chemical fertilizers

Publish Date: 1987-01-01

GB/T 8570.1-1988 Replaced

GB/T 8570.1-1988 Liquefied anhydrous ammonia—Taking a laboratory sample

Publish Date: 1988-01-03

GB/T 8570.2-1988 Replaced

GB/T 8570.2-1988 Liquefied anhydrous ammonia—Estimating of ammonia content

Publish Date: 1988-01-03

GB/T 8570.3-1988 Replaced

GB/T 8570.3-1988 Liquefied anhydrous ammonia—Determination of residue content—Gravimetric method

Publish Date: 1988-01-03

GB/T 8570.4-1988 Replaced

GB/T 8570.4-1988 Liquefied anhydrous ammonia—Determination of residue content—Titrimetric method

Publish Date: 1988-01-03