GB10730-2008
Primary chemical - Potassium hydrogen phthalate
第一基准试剂 邻苯二甲酸氢钾
GB 10730-2008 is a current mandatory Chinese national standard for Primary chemical - Potassium hydrogen phthalate. 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 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.
Technical requirements
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.
Testing methods
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.
FAQs
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.
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 10730-1989