GB1260-2008

Working chemical - Zinc oxide

工作基准试剂氧化锌

GB 1260-2008 é uma norma nacional chinesa obrigatória vigente: Working chemical - Zinc oxide. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de jun. de 2009.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to working chemical zinc oxide (ZnO) used as a working reference reagent in titration analysis. It is specifically designed for high-purity chemical reagents used in analytical laboratories. This standard is not applicable to industrial-grade or general-purpose zinc oxide.

Requisitos técnicos

This standard specifies the physical properties and chemical purity requirements for working reference zinc oxide. The product is identified as a white or pale yellow crystalline powder, soluble in acids and alkali hydroxides but insoluble in water. Chapter 4 and clauses 5.3.1 and 5.3.2 regarding content determination are mandatory. The standard establishes strict specifications for the active content of ZnO, requiring it to fall within an extremely narrow purity range. It also sets maximum allowable limits for various impurities, including chlorides, sulfur compounds, and nitrates. Additionally, the standard defines parameters for ignition loss, clarity of solution, and the presence of free alkali. Trace metal impurities such as magnesium, calcium, iron, and lead are strictly regulated to ensure the reagent's suitability for precise analytical titration.

Métodos de ensaio

The standard outlines specific testing procedures to verify compliance. The primary assay for ZnO content is determined via EDTA titrimetric method, following the guidelines of GB 10738. Impurities such as magnesium, calcium, and lead are quantified using flame atomic absorption spectrometry in accordance with GB/T 9723. Other tests include visual turbidimetric methods for chlorides and sulfates, and colorimetric comparisons for iron and nitrates. Strict protocols for ignition loss at 800°C and clarity testing are also detailed.

Perguntas frequentes

What products are regulated under GB 1260-2008?

This standard regulates working chemical zinc oxide (ZnO) used primarily as a working reference reagent for titration analysis. It is intended for high-purity laboratory applications rather than industrial manufacturing.

Are there any updates from the previous version of GB 1260-2008?

The 2008 edition revised the determination method for ZnO content and removed Appendix A regarding the preparation of reference solutions. It also updated the standard name to 'Working chemical - Zinc oxide', aligning it with current chemical reagent classification systems.

How does GB 1260-2008 differ from ISO standards?

GB 1260-2008 is a national standard specifically for working reference reagents in China, featuring extremely strict purity thresholds (e.g., 99.95%-100.05%). It references methodologies similar to ISO 6353 but establishes distinct compliance criteria for the Chinese market. Manufacturers must adhere strictly to these local specifications.

The summary above provides a high-level overview of GB 1260-2008. To ensure complete compliance for your chemical products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 1260-2008 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: G61
ICS: 71.040.30
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: Ministry of Industry and Information Technology

Relações

Substitui:GB 1260-1990