GB10730-2008

Primary chemical - Potassium hydrogen phthalate

第一基准试剂邻苯二甲酸氢钾

GB 10730-2008 é uma norma nacional chinesa obrigatória vigente: Primary chemical - Potassium hydrogen phthalate. 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 of primary chemical reagents, specifically potassium hydrogen phthalate (KHC8H4O4). It is intended for manufacturers and laboratories producing or testing high-purity reference materials for volumetric analysis. It does not apply to general-purpose or lower-grade industrial chemicals.

Requisitos técnicos

The standard specifies stringent requirements for the purity and physical properties of potassium hydrogen phthalate. The core mandatory requirements include the assay content, which must fall within an extremely narrow range, and specific testing procedures for sample preparation and titration. It defines limits for various physicochemical parameters, including pH value, clarity, and water insolubility. Additionally, the standard sets maximum allowable limits for trace impurities such as chlorides, sulfur compounds, sodium, iron, and heavy metals (as Pb). The standard also details the packaging, storage, and labeling requirements to ensure the stability of the reference material. Compliance with these specifications is mandatory for certification as a primary reference reagent in China.

Métodos de ensaio

The primary assay method utilizes constant-current precision coulometric titration, employing a platinum mesh electrode and an acidity meter for endpoint detection. Other testing methods include flame atomic absorption spectrometry for sodium determination, and standard colorimetric or turbidimetric methods for impurities like chlorides, iron, and heavy metals. The standard also references specific GB/T methods for pH and water insolubility testing.

Perguntas frequentes

What is the purity requirement for potassium hydrogen phthalate under GB 10730-2008?

The standard requires a highly specific assay content range for potassium hydrogen phthalate, ensuring its suitability as a primary reference material. The exact mass fraction limits are specified in the standard's technical tables.

Is GB 10730-2008 a mandatory standard?

Yes, specific clauses within the standard, particularly those concerning the assay content and the titration methodology, are designated as mandatory. Other clauses are recommended.

What is the primary method for content determination in this standard?

The content determination is performed using constant-current precision coulometric titration, which measures the exact amount of electricity consumed during the electrolysis process to calculate the substance's purity.

The summary above provides a high-level overview of GB 10730-2008. 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 10730-2008 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 10730-1989