GB10731-2008

Primary chemical - Potassium dichromate

第一基准试剂重铬酸钾

GB 10731-2008 é uma norma nacional chinesa obrigatória vigente: Primary chemical - Potassium dichromate. 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 the inspection and production of primary chemical reagent potassium dichromate used in high-precision analytical laboratories. It is specifically designed for manufacturers and suppliers of first-grade reference materials in China. Compliance with this standard is mandatory for specific technical clauses when distributing these chemical reagents domestically.

Requisitos técnicos

GB 10731-2008 specifies the stringent specifications for primary chemical potassium dichromate. The standard outlines the required purity levels and maximum allowable limits for various impurities, including water insoluble matter, chlorides, sulfates, sodium, calcium, and iron. The standard mandates that the content of potassium dichromate must fall within an extremely narrow purity range to qualify as a primary reference material. Manufacturers must strictly adhere to the mandatory clauses regarding assay determination and specifications. Additionally, the standard details the physical properties, requiring the reagent to be orange-red crystalline particles or powder, soluble in water but insoluble in ethanol. Packaging, storage, and labeling requirements are also specified, referencing standards like GB 15346 and GB 15258.

Métodos de ensaio

The primary assay for potassium dichromate content is determined using constant current precision coulometric titration, based on Faraday's law of electrolysis. Impurities such as sulfates and water insolubles are tested according to GB/T 9728 and GB/T 9738 respectively. The determination of sodium is conducted via flame atomic absorption spectrometry following GB/T 9723-2007.

Perguntas frequentes

What products are regulated under GB 10731-2008?

It regulates primary chemical reagent potassium dichromate, which is used as a first-grade reference material in volumetric analysis.

Are there any mandatory clauses in GB 10731-2008?

Yes, Chapter 4, 5.2.3, and 5.2.4.1 are mandatory, covering specifications, assay determination procedures, and calculation methods.

How does GB 10731-2008 differ from the 1989 version?

The 2008 version updates the assay principle description, modifies the coulometric device schematic, and adds calculation methods for measurement uncertainty, replacing the old GB 10731-1989.

The summary above provides a high-level overview of GB 10731-2008. To ensure complete compliance for your 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 10731-2008 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 10731-1989