Preparation of reference material for high concentration hexavalent chromium solution
Development of high concentration hexavalent chromium solution reference material.Potassium dichromate purity reference material was used as raw material,and 1%nitric acid as solvent,the reference material of hexavalent chromium solution in water with the mass concentration of 100 μg/mL was prepared by weight-volume method.The prepared reference material was directly determined by ultraviolet-visible spectrophotometry without dilution,and the uniformity,stability and quantity verification were carried out.The F-test and regression curve results show that the developed reference material had good uniformity and stability,and the comparative verification results show that its accuracy was consistent with the national secondary standard substance.The reference material can provide assurance for the accuracy,reliability,and mutual recognition of hexavalent chromium detection data in fields such as environmental test.
万方数据
维普
