GB/T 36084-2018 (English Version) PDF

Scope: This standard specifies the determination of divalent copper ions (Cu²⁺), divalent manganese ions (Mn²⁺) and hexavalent chromium ions [Cr(VI )] content method. This standard is applicable to the determination of divalent copper ions, divalent manganese ions and hexavalent chromium ions in aqueous solution samples. After proper treatment of soil, food or biological samples, etc., they can be determined with reference to this standard. The detection limit of each ion in the water sample to be tested applicable to this standard is: the content of Cu²⁺ is not less than 1.00×10^-7 mol? L^-1, Mn^{The content of 2+} is not less than 1.00×10^-6 mol? L^-1, and the content of Cr(VI) is not less than 4.00×10^-7 mol? L^{- 1}. The pH range of water samples to be tested for this standard is: the pH range of the aqueous solution containing Cu²⁺ is 2~6, the pH range of the aqueous solution containing Mn²⁺ is 3~7, and the pH range of the aqueous solution containing Cr( The pH range of the aqueous solution of VI) is 1～6.

GB/T 36084-2018 Referenced Document

GB/T 14666 Terms for analytical chemistry
GB/T 19619 Terminology for nanomaterials
GB/T 26813 Double beam UV/VIS spectrophotometer
GB/T 27411 Routine methods for evaluation and expression of measurement uncertainty in testing laboratory
GB/T 6682 Water for analytical laboratory use.Specification and test methods

2018 GB/T 36084-2018 Nanotechnology—Determination of copper, manganese and chromium ions in aqueous solution—Ultraviolet-visible spectrophotometry