YS/T 536.5-2009Methods for chemical analysis of bismuth. Determination of zinc content. Solid-liquid extraction-flame atomic absorption spectorphotometric 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 5.

The partial replacement of YS/T 536.5-2006 (formerly GB/T 8220.5-1998) "Methods for chemical analysis of bismuth solid-liquid extraction separation - Flame Atomic absorption spectrometry zinc content. " Compared with YS/T 536.5-2006, this section has the following changes.

--- Complements the precision, quality assurance and control provisions;

--- Text format has been modified.

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 section is Shizhuyuan Nonferrous Metals Co., Ltd., Shenzhen Lingnan Nonferrous Metals Co., Ltd. Shaoguan smelter Participated in the drafting.

1 Scope

This section provides the determination of bismuth in zinc content.

This section applies to the determination of bismuth in zinc content. Measurement range (mass fraction). 0.00005% to 0.0070%.

2 Method summary

Sample dissolved in nitric acid, evaporated to dryness just (to avoid nitrogen oxides), adding the appropriate volume of water, subjected to ultrasonic solid-liquid extraction, so that Zinc and body separated from the supernatant by air - atomic absorption spectrometer wavelength 213.8nm measured absorbance of zinc acetylene flame to a standard curve Line method to calculate the amount of zinc.

3 Reagents

After solution preparation and analysis of water are a water containers were used in the experiments with dilute nitric acid (1 + 4) soak, wash thoroughly with a water.

4 Instrument

Atomic absorption spectrometer, with zinc hollow cathode lamp.

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

--- Characteristic concentration. In line with the measurement of the sample solution matrix solution, characterized in zinc concentration should be less than 0.013µg/mL.

--- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%;

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 0.5% 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.

Instrument Reference Working conditions. Wavelength. 213.8nm; lamp current. 2mA; monochromator passband. 0.2nm; burner height. 6mm; air Flow. 7.0L/min; acetylene flow. 3.0L/min.