GB10732-2008

Primary chemical - Potassium chloride

第一基准试剂氯化钾

GB 10732-2008 est une norme nationale chinoise obligatoire en vigueur : Primary chemical - Potassium chloride. Secteur : Électronique. Thème principal : Sécurité des produits. Entrée en vigueur : 1 juin 2009.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

This standard applies to the inspection of primary chemical reagent potassium chloride. It specifies the characteristics, specifications, testing methods, inspection rules, and packaging requirements for this high-purity chemical. It is mandatory for manufacturers producing primary benchmark potassium chloride in China. The standard is not applicable to general-purpose or analytical-grade potassium chloride.

Exigences techniques

The standard outlines the physical and chemical specifications for primary chemical potassium chloride. It mandates strict purity levels, requiring the KCl content to be within an extremely narrow range around 100%. Additionally, it sets limits on various impurities including pH value, water insolubles, iodides, bromides, sulfates, and total nitrogen. Trace metal impurities are strictly controlled under this standard. Parameters for sodium, magnesium, calcium, iron, barium, and heavy metals (as Pb) are specified to ensure the highest purity required for primary benchmark reagents. Compliance with these impurity limits is essential for certification. Packaging and marking must conform to the requirements of GB 15346. The standard specifies particular packaging units and internal/external packaging forms to maintain the chemical's integrity during storage and transportation.

Méthodes d’essai

The primary method for determining KCl content is constant current coulometric titration, using a silver anode to generate silver ions that react with chloride ions, with potentiometric endpoint detection. Other testing methods include: - pH determination according to GB/T 9724. - Flame atomic absorption spectrometry for sodium and magnesium (GB/T 9723-2007). - Visual colorimetric and turbidimetric methods for impurities like iodides, bromides, sulfates, phosphates, calcium, iron, barium, and heavy metals. - Gravimetric method for water insolubles (GB/T 9738).

Questions fréquentes

What products are regulated under GB 10732-2008?

GB 10732-2008 regulates primary chemical reagent potassium chloride, which is a high-purity benchmark chemical used for precise analytical measurements.

Are there any updates from the previous version of GB 10732-2008?

Yes, this version replaces GB 10732-1989. Key updates include the addition of normative references, modified descriptions of the content determination principle, and the addition of an uncertainty calculation method for the assay results.

What is the core testing method for potassium chloride content in this standard?

The standard uses constant current precision coulometric titration. It involves electrolyzing a silver anode to produce silver ions that react with chloride ions, calculating the content based on Faraday's law of electrolysis.

The summary above provides a high-level overview of GB 10732-2008. 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 10732-2008 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Produit
CCS: G61
ICS: 71.040.30
Autorité compétente: Ministry of Industry and Information Technology
Comité technique: Ministry of Industry and Information Technology

Relations

Remplace:GB 10732-1989