YS/T 536.2-2009Methods for chemical analysis of bismuth. Determination of iron content. Electrothermal atomic absorption 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 2.

The partial replacement of YS/T 536.2-2006 (formerly GB/T 8220.2-1998) "Methods for chemical analysis of bismuth 1,10 phenanthroline Determination of the amount of iron "method. Compared with YS/T 536.2-2006, this section has the following changes.

--- Change measurement method using electrothermal atomic absorption spectrometry;

--- Complements the precision, 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.

This section drafted by the Zhuzhou Smelter Group Co., Ltd.

This part of Liaoning Entry-Guangzhou Nonferrous Metal Research Institute participated in the drafting.

1 Scope

This section provides the determination of bismuth iron content.

This section applies to the determination of bismuth iron content. Measurement range (mass fraction). 0.0003% to 0.0015%.

2 Method summary

The sample is dissolved in nitric acid, the amount of solution into electrothermal atomizer, atomic absorption spectrometer measured at a wavelength of 248.3nm iron Absorbance method using the matrix by adding drawing working curve, determined the content of iron in a sample.

3 Reagents

Preparation of the test solution and water are a water, containers used in the experiment were soaked in dilute nitric acid, with a water thoroughly washed.

4 Instrument

Graphite furnace atomic absorption spectrometry (background buckle device) attached iron hollow cathode lamp.

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

--- Quality features. the measurement of the sample solution in the matrix phase consistent solution features quality iron should not exceed 5pg.

--- Precision. absorbance measured 10 times the highest concentration of the standard solution, the standard deviation should not exceed 2.0% of the mean absorbance;

With the lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum 1.5% concentration of the standard average absorbance.

--- Linear curve. The curve is divided into five sections according to concentration, absorbance difference between the absorbance difference between the highest and the lowest segment of the segment Ratio of not less than 0.8.