GB/T 1397-2015Chemical reagent -- Potassium carbonate anhydrous (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules.

This standard replaces GB/T 1397-1995 "chemical reagents potassium carbonate," compared with the GB/T 1397-1995 Technical Changes as follows.

--- Standard name "potassium" to "anhydrous potassium carbonate";

--- Clarity test specifications by a "qualified" to "2", "3", "5" (see Chapter 4, 1995, version 3.2);

--- Project name "drying loss" to "loss on ignition" (see Chapter 4, 55, 1995 edition of 3.2,4.2.3.);

--- Adjust the amount of sodium sampling measurement (see 510, 1995 version 4.2.8.);

--- Modify the determination of iron (see 514, 1995 edition of 4.2.12.);

--- Improved copper, lead two of the measuring method (see 515, 517, 1995 edition 4.2.13,4.2.15.);

--- Adjustment packaging and signs (see Chapter 7, Chapter 6, 1995 edition).

The standard reference method using redrafted ISO 6353-3. 1987 "Chemicals - Part 3. Specification 2 of the series" The R76 "carbon Potassium "preparation, and ISO 6353-3. 1987 is non-equivalent. The standard proposed by China Petroleum and Chemical Industry Association.

1 Scope

This standard specifies the chemical reagents traits of anhydrous potassium carbonate, specification, testing, inspection rules, packaging, storage, transportation and signage.

This standard applies to chemical agents anhydrous potassium carbonate test.

Molecular formula. K2CO3 Molecular weight. 138.20 (according to 2011 international relative atomic mass)

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

Preparation of GB/T 601 chemical reagent standard titration solution Preparation of standard solution of GB/T 602 Determination of impurities in chemical reagents

GB/T 603 chemical reagent in test methods - Preparations with GB/T 609 chemical reagent - General method for determination of total nitrogen

GB/T 610-2008 General method for determination of arsenic chemical reagents Laboratory use specifications and test methods

GB/T 6682 Analysis

GB/T 9723-2007 Chemicals flame atomic absorption spectrometry General

GB/T 9728 General method for determination of chemical reagents sulfate

GB/T 9729 General method for determination of chloride Chemicals General method for determination of GB/T 9734-2008 aluminum Chemicals

GB/T 9738 Determination of water insoluble chemical reagent - General method

GB/T 9739 General method for determination of iron chemical reagents

GB 15346 chemical reagent packaging and marking

HG/T 3484 standard chemical reagents glass emulsion and clarity standards

HG/T 3921 Chemicals sampling and acceptance rules

3 Characters

This reagent is white powder or granules, deliquescent, soluble in water.

4 Specification

Of anhydrous potassium carbonate as shown in Table 1.