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 (English Version)
This standard specifies the method for the determination of arsenic content in agricultural rare earth nitrate. This standard is applicable to the determination of arsenic content in agricultural rare earth nitrate, the determination range: 0.00002% ~ 0.0020%.
GB/T 12687.3-1990 history
2011GB/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
1990GB/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 12687.3-1990 Chemical analysis of nitrate of rare earth for agriculture--Determination of arsenic content--Hydride generation flame atomic absorption spectrophotometric method was changed to 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.