YS/T 536.7-2009Methods for chemical analysis of bismuth. Determination of arsenic content. Atomic fluorescence spectrometric method (English PDF)

Foreword

YS/T 536-2009 "Method for chemical analysis of bismuth" is divided into 13 parts.

--- YS /536.1 Methods for chemical analysis of bismuth - Determination of copper content - Bis - acetaldehyde T oxalyl Spectrophotometric Method;

--- YS/T 536.2 Methods for chemical analysis of bismuth - Determination of iron content by electrothermal atomic absorption spectrometry;

--- YS/T 536.3 Methods for chemical analysis of bismuth - Determination of antimony content - Malachite green spectrophotometry;

--- YS/T 536.4 Methods for chemical analysis of bismuth - Determination of silver content - Flame atomic absorption spectrometry and electrothermal atomic absorption spectrometry;

--- YS/T 536.5 Methods for chemical analysis of bismuth - Determination of solid-liquid extraction of zinc content - Flame atomic absorption spectrometry;

--- YS/T 536.6 Methods for chemical analysis of bismuth - Determination of lead content by electrothermal atomic absorption spectrometry;

--- YS/T 536.7 Methods for chemical analysis of bismuth arsenic content - Atomic fluorescence spectrometry;

--- YS/T 536.8 Methods for chemical analysis of bismuth chlorine measured amount of mercury thiocyanate spectrophotometry;

--- YS/T 536.9 Methods for chemical analysis of bismuth - Determination of tellurium content of arsenic co-precipitation - oscillopolarographic method;

--- YS/T 536.10 Methods for chemical analysis of bismuth - Determination of tin content of beryllium coprecipitation - spectrophotometry;

--- YS/T 536.11 Methods for chemical analysis of bismuth mercury content - Atomic fluorescence spectrometry;

--- Determination of YS/T 536.12 Methods for chemical analysis of nickel content of bismuth electrothermal atomic absorption spectrometry;

--- YS/T 536.13 Methods for chemical analysis of bismuth - Determination of cadmium content by electrothermal atomic absorption spectrometry.

This is Part 7.

The partial replacement of YS/T 536.7-2006 (formerly GB/T 8220.7-1998) "Methods for chemical analysis of bismuth ion exchange separation - hydride Generation - flame atomic absorption spectrometry determination of arsenic content. " Compared with YS/T 536.7-2006, this section has the following changes.

--- Replacement by atomic fluorescence spectrometry hydride generation - flame atomic absorption spectrometry;

--- Complements the precision and quality assurance and control provisions.

The non-ferrous metal part by the National Standardization Technical Committee and centralized.

This section is Zhuzhou Smelter Group Co., Ltd. is responsible for drafting.

1 Scope

This section provides the determination of bismuth in the amount of arsenic.

This section applies to the determination of bismuth in the amount of arsenic. Measurement range (mass fraction). 0.00003% ~ 0.0012%.

2 Method summary

Sample was dissolved in nitric acid. In dilute nitric acid medium by cation exchange column separation of arsenic and the substrate, pre-reduction with ascorbic acid, in hydride generator, arsenic is reduced to potassium borohydride hydride with argon gas into the quartz furnace atomizer, and the atomic fluorescence spectrometer Measuring the fluorescence intensity of arsenic.

3 Reagents

4 Instruments and devices

4.1 cation exchange column. acid in 25mL buret with water previously charged by water immersion 24h, hydrochloric acid (5 + 95) soaking 4h, washed with water PH3 ~ pH4 to strong acid cation exchange resin 732 15mL (equivalent to 6g dry resin).

4.2 atomic fluorescence spectrometer, with a high-intensity arsenic hollow cathode lamp.

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

Detection limit. not more than 1 × 10-9g/mL.

Precision. with 0.1µg/mL solution of arsenic standard fluorescence intensity was measured 10 times, and the standard deviation should not exceed the average fluorescence intensity 5.0%.