GB10734-2008
Primary chemical - Ethylenediamine tetraacetic acid disodium salt
第一基准试剂 乙二胺四乙酸二钠
GB 10734-2008 is a current mandatory Chinese national standard for Primary chemical - Ethylenediamine tetraacetic acid disodium salt. 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 primary chemical reagents, specifically Ethylenediaminetetraacetic acid disodium salt (EDTA disodium salt), used as a first-class reference material. It covers the chemical's properties, specifications, testing methods, inspection rules, and packaging requirements. It is strictly applicable to high-purity laboratory reagents and not intended for general industrial-grade chemicals.
Technical requirements
The standard establishes mandatory specifications for the purity and physical properties of the reagent. The primary assay requires the content of EDTA disodium salt to be strictly controlled within an extremely narrow range around 100%, utilizing an absolute quantification method. Manufacturers must ensure the content determination uncertainty remains below 0.02%. Additionally, the standard sets stringent maximum limits for various impurities and physical parameters. This includes specific thresholds for pH value, clarity, water-insoluble matter, and complexing force efficacy. Key chemical contaminants regulated include chlorides, sulfates, and heavy metals (such as Iron, Copper, and Lead). It also restricts the presence of Nitrilotriacetic acid as a specific organic impurity. Packaging, storage, and transportation must comply with the general chemical reagent packaging standards, ensuring the stability and integrity of the primary reference reagent.
Testing methods
The core assay utilizes precision constant-current coulometric titration to determine the absolute mass fraction of the active ingredient, calculating purity based on Faraday's law of electrolysis. This method requires highly specialized apparatus including a mercury-amalgamated zinc electrode and a precise electrochemical endpoint detection circuit. Impurity testing relies on standard chemical and instrumental methods: visual limit tests for chlorides and sulfates via turbidity comparison, and colorimetric methods for heavy metals and iron. The Nitrilotriacetic acid content is specifically evaluated using polarography. General physical properties like pH and clarity are measured against established reference standards.
FAQs
What products are regulated under GB 10734-2008?
This standard regulates primary chemical reagents, specifically Ethylenediaminetetraacetic acid disodium salt (EDTA-Na2). It is intended for high-purity reference materials rather than general industrial or commercial grade chemicals.
Are there any updates from the previous version of GB 10734-2008?
The 2008 version updated the standard name, added normative references, modified the principle of content determination, improved pre-titration operations, and introduced a calculation method for the uncertainty of measurement results, which was not present in the 1989 version.
How does GB 10734-2008 differ from ISO standards?
While it references several ISO standards for general impurity testing (e.g., ISO 6353-1), the core assay method relies on precision constant-current coulometric titration. This absolute quantification method based on Faraday's law is specifically tailored for certifying primary reference chemicals in China.
The summary above provides a high-level overview of GB 10734-2008. To ensure complete compliance for your chemical 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 10734-2008 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 10734-1989