GB/T 3253.11-2009Methods for chemical analysis of antimony and antimony trioxide - Determination of bismuth content - Flame atomic absorption spectrometric method (English PDF)

1 Scope

GB/T 3253 provisions of this part of the determination of bismuth antimony and antimony trioxide in the amount.

This section applies to the determination of bismuth and antimony trioxide in the amount. Measurement range. 0.0010% to 0.10%.

2 Method summary

Antimony sample dissolved in aqua regia, antimony trioxide sample with hydrochloric acid - hydrogen bromide dissolved in sulfuric acid medium, proper temperature control, addition of hydrochloric acid -

In addition hydrobromide volatile antimony in hydrochloric acid medium, atomic absorption spectrometer wavelength 223.1nm measured absorbance of bismuth.

3 Reagents

Unless otherwise indicated, the reagents used in this section refer to water and analytical grade and third grade water.

4 Instrument

Atomic absorption spectrometer, with a bismuth hollow cathode lamp.

Under optimum working conditions for those who can reach the following indicators can be used.

--- Sensitivity. substantially consistent with the measurement of the solution, the characteristic concentration of cadmium should not exceed 0.2µg/mL;

--- Precision. measuring absorbance 10 times the highest concentration of the standard, and the standard deviation shall not exceed 1.00% of the average absorbance,

With the lowest concentration (not zero concentration) standard solution absorbance measured 10 times, and the standard deviation should not exceed the maximum concentration of the standard

0.50% average absorbance;

--- Linear curve. the curve was divided into five sections, the difference between the ratio of the absorbance of the absorbance difference between the highest and the lowest segment section shall not

Less than 0.8.