YS/T 715.3-2009Methods for chemical analysis of selenium dioxide. Part 3: Determination of chlorine content. Silver chlorine turbidimetrion method (English PDF)

Foreword

YS/T 715 "selenium dioxide chemical analysis method" is divided into five parts.

--- Part 1. Determination of the amount of selenium dioxide, sodium thiosulfate titration;

--- Part 2. arsenic, cadmium, iron, mercury, lead content - Inductively coupled plasma atomic emission spectrometry;

--- Part 3. Determination of chlorine content of silver chloride turbidimetric method;

--- Part 4. residue on ignition - Gravimetric method;

--- Part 5. water-insoluble content - Gravimetric method.

This section YS/T Part 3 715.

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

This section is responsible for drafting unit. Tongling Nonferrous Metals Group Holdings Limited.

This section is drafted. Guangzhou Nonferrous Metal Research Institute.

Participated in the drafting of this section. Tongling Nonferrous Metals Group Holdings Co., Jiangxi Copper Corporation.

1 Scope

YS/T of the provisions of section 715 of the method for the determination of selenium dioxide in the chlorine content.

This section applies to the determination of selenium dioxide in the chlorine content. Measurement range. 0.0010% to 0.050%.

2 Method summary

Sample was dissolved in water, glycerol in the presence of silver nitrate and chlorine generated silver chloride emulsion, measured at 420nm wavelength spectrophotometer the amount of the absorbance.

3 Reagents

Unless otherwise indicated in the analysis using only the reagents and recognized as distilled or deionized water or equivalent purity analytical grade, this section Test water is deionized water, third grade water specifications.

Nitrate 3.1 (rho1.42g/mL).

Glycerin 3.2 (1 + 1).

3.3 silver nitrate solution (10g/L).

3.4 Storage chlorine standard solution. Weigh 1.6485g reference sodium chloride (pre-ignition to constant weight at 400 °C ~ 500 °C, cooled in a dryer to room temperature) was dissolved in water and transferred to 1000mL volumetric flask, dilute with water to the mark. This solution 1mL 1mg containing chlorine.

3.5 Chlorine Standard Solution A. Pipette 10.00mL chlorine standard stock solution (3.4) into 100mL volumetric flask, dilute to the mark with water, shake uniform. This solution 1mL containing 100µg chlorine.

3.6 chlorine standard solution B. Pipette 10.00mL chlorine standard solution A (3.5) into 100mL volumetric flask, dilute to the mark with water, shake uniform. This solution 1mL containing 10µg chlorine.

4 Instrument

Spectrophotometer.

5 Sample

Sample required uniform, dry and seal intact.

6 Step, Analysis