GB/T 12689.9-2004 《The methods for chemical analysis of zinc and zinc alloys--The determination of antimony content--The atomic fluorescence spectrometer and the flame atomic absorption spectrometric method》 Related products

This standard specifies methods for the determination of antimony in zinc and zinc alloys, applicable to the determination range of 0.0010% to 0.050%. The standard describes the principles of determination using Atomic fluorescence spectrometry, AFS and flame atomic absorption spectroscopy (AAS) methods. Samples are dissolved by nitric acid-tartaric acid, pre-reduced with ascorbic acid, and copper ions are masked with thiourea. After antimony is reduced to hydride in a hydride generator, it is introduced into a quartz furnace Atomizer for fluorescence determination. The standard details the reagents, instruments and operation procedures to ensure the accuracy and conformity of the measurement.