YS/T 715.4-2009Methods for chemical analysis of selenium dioxide. Part 4: Determination of burning residue. Gravimetric analysis (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 4 715.

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. JCC.

Participated in the drafting of this section. Guangzhou Research Institute of Nonferrous Metals, Tongling Nonferrous Metals Holding Group Co., Ltd.

1 Scope

YS/T of the provisions of section 715 of the method for the determination of selenium dioxide content of the residue on ignition.

This section applies to the determination of selenium dioxide residue on ignition amount. Residue on ignition measured by this standard, according to the sample volume and value calculation specifications Residue on ignition quality was not less than 1mg, its measurement range. 0.05% to 0.25%.

2 Method summary

Formed between the body and the use of sample material in a volatile residue, heat, oxygen difference in stability of the sample body completely Volatile, high-temperature burning to constant weight after weighing the quality of the residue.

3 Instrument

3.1 100mL ceramic crucibles.

3.2 high-temperature furnace. 0 °C ~ 1000 °C.

3.3 Analysis of balance. a sense of the amount of 0.1mg.

3.4 dryer.

4 Sample

Sample required uniform, dry and seal intact.

5 Step, Analysis