GB/T 669-2023Chemical reagent—Strontium nitrate (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 669-1994 "Chemical Reagent Strontium Nitrate". Compared with GB/T 669-1994, except for structural adjustment and editing In addition to sexual changes, the main technical changes are as follows.

— Added technical requirements and measurement methods for pH value (see Chapter 5, 6.3);

— The technical requirements for the clarity test have been changed, from "qualified" to "<=No. 2" and "<=No. 4" (see Chapter 5, 1994 edition 3.2);

— The technical requirements for sodium have been changed, and the technical requirements for analytical purity have been adjusted from "<=0.03%" to "<=0.02%" (see Chapter 5, 1994 edition 3.2);

— The technical requirements for potassium have been changed. The technical requirements for analytical purity have been adjusted from "<=0.02%" to "<=0.01%", and the technical requirements for chemical purity have been adjusted from "<=0.02%" to "<=0.01%".

"<=0.05%" is adjusted to "<=0.02%" (see Chapter 5, 3.2 of the 1994 edition);

— The technical requirements for calcium have been changed. The technical requirements for analytical purity have been adjusted from "<=0.03%" to "<=0.01%", and the technical requirements for chemical purity have been adjusted from "<=0.03%" to "<=0.01%".

"<=0.05%" is adjusted to "<=0.02%" (see Chapter 5, 3.2 of the 1994 edition);

— The determination method of strontium nitrate has been changed (see 6.2, 4.1 of the 1994 edition);

— Added the determination method of barium by inductively coupled plasma atomic emission spectrometry (see 6.14);

— Added the sodium sulfide-glycerol colorimetric method for determination of heavy metals (see 6.15);

— Changed the inspection rules (see Chapter 7, Chapter 5 of the 1994 edition);

— Changed the packaging and logo (see Chapter 8, Chapter 6 of the 1994 edition);

— Deleted the technical requirements and determination methods of free acid (see 3.2 and 4.2.4 of the 1994 edition).

Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.

This document is proposed by China Petroleum and Chemical Industry Federation.

This document is under the jurisdiction of the Chemical Reagents Sub-Technical Committee of the National Chemical Standardization Technical Committee (SAC/TC63/SC3).

This document was drafted by: Xilong Science Co., Ltd., Beijing Institute of Chemical Reagents Co., Ltd.

The main drafters of this document. Huang Pingqing, Luo Yuan, Chen Yixuan, Wang Yuhua, Zhao Jifei, Han Baoying, She Lajiao, Lin Xujun, Zhou Yubin, Wang Lianwang, Meng Xiandong.

This document was first published in 1965, revised for the first time in 1977, revised for the second time in 1994, and this is the third revision.

Chemical reagent strontium nitrate Warning. Some test procedures specified in this document may lead to hazardous situations, and the user is responsible for taking appropriate safety and health measures.

1 Scope

This document specifies the properties, technical requirements, test methods, inspection rules, packaging and marking of the chemical reagent strontium nitrate.

This document applies to the inspection of the chemical reagent strontium nitrate.

Note. The molecular formula of the chemical reagent strontium nitrate is Sr(NO3)2, the relative molecular mass is 211.63 (according to the 2022 international relative atomic mass), and the CAS number is 10042-76-9.

2 Normative reference documents

GB/T 601

GB/T 602

GB/T 603

GB/T 6682

GB/T 9723-2007

GB/T 9724

GB/T 9728

GB/T 9729

GB/T 9735-2008

GB/T 9738

GB/T 9739

GB 15258

GB 15346

GB/T 23942-2009

3 Terms and definitions

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

4 Traits

Strontium nitrate is colorless crystal or white powder, easily soluble in water, slightly soluble in alcohol or ketone, and insoluble in ethanol (anhydrous ethanol).