GB10731-2008

Primary chemical - Potassium dichromate

第一基准试剂重铬酸钾

GB 10731-2008 es una norma nacional china obligatoria vigente: Primary chemical - Potassium dichromate. Sector: Electrónica. Enfoque: Seguridad de productos. Entrada en vigor: 1 jun 2009.

La aplicabilidad depende del alcance del producto, la vía de certificación, los avisos de la autoridad competente y las reglas de transición. Solicite una traducción o verifique la fuente antes de usar esta ficha en una decisión de cumplimiento.

Resumen de cumplimiento

Este resumen está disponible por ahora solo en inglés.

Alcance y aplicabilidad

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 ensayo

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.

Preguntas frecuentes

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.

Indicaciones de aplicabilidad

Tipo: Producto
CCS: G61
ICS: 71.040.30
Organismo competente: Ministry of Industry and Information Technology
Comité técnico: Ministry of Industry and Information Technology

Relaciones

Sustituye a:GB 10731-1989