YS/T 710.1-2009Method for chemical analysis of cobalt oxide. Part 1: Determination of cobalt content. Potentiometric method (English PDF)

Foreword

YS/T 710 "cobalt oxide chemical analysis method" is divided into six sections.

--- Part 1. Determination of cobalt content potentiometric titration;

--- Part 2. Determination of sodium content by flame atomic absorption spectrometry;

--- Part 3. Determination of the amount of sulfur by high frequency combustion infrared absorption method;

--- Part 4. Determination of arsenic content by atomic fluorescence spectrometry;

--- Part 5. Determination of silicon content - Molybdenum blue spectrophotometric method;

--- Part 6. calcium, cadmium, copper, iron, magnesium, manganese, nickel, lead and zinc content - Inductively coupled plasma atomic emission spectrometry.

This section YS/T Part 1 710.

The partial replacement of YS/T 256-2000 "cobalt oxide" in Appendix A. Compared with YS/T 256-2000 "cobalt oxide" in Appendix A, this section the main changes are as follows.

--- Potentiometric titration of cobalt potassium nitrite alternative gravimetric method;

--- 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 responsible for drafting unit. Zhuzhou Smelter Group Co., Ltd.

This section is drafted. Ganzhou cobalt tungsten limited liability company.

Participated in the drafting of this section. Zhejiang Galico Cobalt Nickel Materials Co., Ltd. Zhejiang Huayou Cobalt.

1 Scope

YS/T of the provisions of section 710 of the method for the determination of the amount of cobalt oxide cobalt.

This section applies to the determination of cobalt content of cobalt oxide. Measurement range. 65.00% - 75.00%.

2 Method summary

Ammonia solution, the standard solution of potassium cyanide with iron cobalt (II) is oxidized to cobalt (III), impurity manganese (II) is quantitatively the presence of potassium ferricyanide Oxidation of manganese (III), excess potassium ferricyanide and then back titration cobalt standard solution, the potential jump to reach the end. The results for the amount of cobalt, and manganese together After the calculated amount of manganese minus factor correction. Manganese Determination result is less than 0.10%, the amount of cobalt results without considering the impact of manganese content factors.

3 Reagents