GB/T 667-2023Chemical reagent—Zinc nitrate hexahydrate (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 667-1995 "Chemical Reagent Zinc Nitrate Hexahydrate (Zinc Nitrate)". Compared with GB/T 667-1995, except In addition to structural adjustments and editorial changes, the main technical changes are as follows.

---The technical requirements and determination methods of zinc nitrate hexahydrate have been changed, and the technical requirements for analytical purity have been adjusted from ">=99.0%" to "99.0%~ 101.0%"; chemical purity technical requirements are adjusted from ">=98.0%" to "98.0%~102.0%" (see Chapter 5, 6.2, 1995 edition 3.1, 4.1);

---The technical requirements for the clarity test have been changed, from "qualified" to "<=No. 2" and "<=No. 4" (see Chapter 5, 1995 edition 3.3);

---The technical requirements for chemical purity of lead have been changed from "<=0.02%" to "<=0.01%" (see Chapter 5, 3.3 of the 1995 edition);

---Added technical requirements and determination methods for sodium, magnesium, potassium, calcium, nickel and copper (see Chapter 5, 6.8);

---Added the measurement method of inductively coupled plasma atomic emission spectrometry for lead and iron (see 6.8.2, 6.9.1);

---Changed the inspection rules (see Chapter 7, Chapter 5 of the 1995 edition);

---Changed the packaging and logo (see Chapter 8, Chapter 6 of the 1995 edition);

---Deleted the technical requirements and measurement methods for ammonium sulfide non-precipitate (calculated as sulfate) (see 3.3 and 4.3.7 of the 1995 edition).

1 Scope

This document specifies the properties, technical requirements, test methods, inspection rules and packaging of the chemical reagent zinc nitrate hexahydrate (zinc nitrate). logo.

This document applies to the inspection of the chemical reagent zinc nitrate hexahydrate (zinc nitrate).

Note: The molecular formula of the chemical reagent zinc nitrate hexahydrate (zinc nitrate) is Zn(NO3)2·6H2O, and the relative molecular mass is 297.48 (according to the 2022 international relative Atomic mass), CAS number is 10196-18-6.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 601 Preparation of chemical reagent standard titration solution

GB/T 602 Preparation of standard solutions for determination of impurities in chemical reagents

GB/T 603 Preparation of preparations and products used in chemical reagent test methods

GB/T 6682 Specifications and test methods for water used in analytical laboratories

GB/T 9723-2007 General principles for flame atomic absorption spectrometry of chemical reagents

GB/T 9724 General principles for determination of pH value of chemical reagents

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

GB/T 9729 General method for determination of chemical reagent chloride

GB/T 9738 General method for determination of water-insoluble matter in chemical reagents

GB 15258 Regulations on Preparing Chemical Safety Labels

GB 15346 Chemical reagent packaging and marking

GB/T 23942-2009 General principles for inductively coupled plasma atomic emission spectrometry of chemical reagents

HG/T 3484-1999 Chemical reagent standard glass emulsion and clarity standard

HG/T 3921 Chemical reagent sampling and acceptance rules

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Traits

Zinc nitrate hexahydrate (zinc nitrate) is white crystal, easily soluble in water and ethanol.