GB/T 14353.16-2010Methods for chemical analysis of copper ores, lead ores and zinc ores - Part 16: Determination of tellurium content (English PDF)

Foreword

GB/T 14353 "copper ores lead ores and zinc ores chemical analysis method" is divided into 18 parts.

--- Part 1. Determination of copper content;

--- Part 2. Determination of lead content;

--- Part 3. Determination of the amount of zinc;

--- Part 4. Determination of cadmium content;

--- Part 5. Determination of nickel content;

--- Part 6. Determination of cobalt content;

--- Part 7. Determination of arsenic content;

--- Part 8. Determination of the amount of bismuth;

--- Part 9. Determination of molybdenum;

--- Part 10. Determination of tungsten;

--- Part 11. determination of silver;

--- Part 12. Determination of sulfur content;

--- Part 13. the amount of gallium, indium and thallium amount for determination;

1 Scope

GB/T 14353.16-2010 is the Chinese national standard on methods for chemical analysis of copper ores, lead ores and zinc ores - part 16: determination of tellurium content, in the field of mining and minerals. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 10 November 2010 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 February 2011. Classification: ICS 73.060, CCS D40. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

GB/T 14353 in this section specifies the method for determination of copper ores lead ores and zinc ores of tellurium content. This section applies to copper ore, determination of tellurium content of lead ores and zinc ores. Measuring range. 0.2µg/g ~ 20µg/g of tellurium.

2 Normative references

The following documents contain provisions which, through reference

GB/T 14353 in this section constitute provisions of this part of the dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. Laboratory use specifications and test methods GB/T 6682 Analysis

GB/T 14505 method for chemical analysis of rocks and ores General rules and regulations Principle

3 Sample nitric acid - hydrofluoric acid - perchloric acid decomposition in hydrochloric acid medium, in the presence of co-precipitant arsenic, tellurium hypophosphite reduction And arsenic to the monomer. Nitric acid monomers were dissolved in a 1% solution of nitric acid, nickel as matrix modifier, at a wavelength at 214.3nm, graphite Furnace atomic absorption spectrophotometer tellurium.

4 Reagents

Unless otherwise stated in this section are consistent with the use of analytical reagent and GB/T 6682 analytical laboratory use in the analysis.

4.1 hypophosphite. Nitrate 4.2 (rho1.42g/mL).

4.3 hydrofluoric acid (rho1.13g/mL) Warning. toxic hydrofluoric acid, is highly corrosive, the operation should wear gloves to prevent skin contact

4.4 perchloric acid (rho1.67g/mL) Warning. This reagent is explosive materials, careful

4.5 hydrochloride (rho1.19g/mL).

4.6 hydrochloride (298).

4.7 hydrochloride (317).

4.8 nitric acid (199).

4.9 copper sulfate - sulfuric acid solution [rho (CuSO4 · 5H2O) = 156g/L] · [sulfuric acid (298)]. 1mL solution containing 100mg of CuSO4.

4.10 disodium hydrogen arsenate solution [rho (Na2HAsO4 · 7H2O) = 21g/L] (1mL solution containing 5mg arsenic). Nickel nitrate solution 4.11 [rho (Ni) = 2mg/mL]. Weigh 2.82g of nickel oxide, 10mL of nitric acid was added (4.2), dissolved by heating, cooled, washed with a small amount to form dish, transferred 1000mL volumetric flask, dilute to the mark, shake.