GB10732-2008
Primary chemical - Potassium chloride
第一基准试剂 氯化钾
GB 10732-2008 is a current mandatory Chinese national standard for Primary chemical - Potassium chloride. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Jun 1, 2009.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
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.
Technical requirements
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.
Testing methods
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).
FAQs
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.
Applicability hints
- Type
- Product
- CCS
- G61
- ICS
- 71.040.30
- Competent department
- Ministry of Industry and Information Technology
- Technical committee
- Ministry of Industry and Information Technology
Relationships
Replaces:GB 10732-1989