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GB6853-2008
pH primary reagent - Potassium dihydrogen phosphate
pH 基准试剂 磷酸二氢钾
GB 6853-2008 es una norma nacional china obligatoria vigente: pH primary reagent - Potassium dihydrogen phosphate. Sector: Electrónica. Enfoque: Seguridad de productos. Entrada en vigor: 1 jun 2009.
La aplicabilidad depende del alcance del producto, la vía de certificación, los avisos de la autoridad competente y las reglas de transición. Solicite una traducción o verifique la fuente antes de usar esta ficha en una decisión de cumplimiento.
Resumen de cumplimiento
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Alcance y aplicabilidad
This standard applies to the inspection and quality control of pH primary reagent potassium dihydrogen phosphate. It is specifically designed for chemical reagent manufacturers and laboratories utilizing this substance as a pH benchmark. It is mandatory for all manufacturers producing this specific pH primary reagent in China. The standard covers the reagent's properties, specifications, testing methods, inspection rules, and packaging requirements, referencing related standards like GB 6851 and GB/T 9724.
Requisitos técnicos
GB 6853-2008 specifies stringent technical requirements for potassium dihydrogen phosphate ($KH_{2}PO_{4}$) used as a pH primary reagent. The core mandatory specifications include the pH(S)II value for mixed phosphate solutions and the precise content of $KH_{2}PO_{4}$, which must be $\geq 99.5\%$. The standard also defines limits for various physical and chemical parameters, including pH value, clarity, loss on drying, and water-insoluble matter. Manufacturers must ensure compliance with these specific chemical purity thresholds. Furthermore, it sets maximum allowable limits for impurities such as chlorides, sulfates, nitrates, ammonium salts, sodium, iron, arsenic, and heavy metals (as Pb). These strict impurity controls are essential for maintaining the reagent's benchmark status, as outlined in GB 6851.
Métodos de ensayo
The standard outlines specific testing procedures to verify compliance. Key methods include potentiometric titration for determining the $KH_{2}PO_{4}$ content and flame atomic absorption spectrometry (per GB/T 9723-2007) for sodium content. Other evaluations involve visual turbidity comparisons for chlorides and sulfates, and specific colorimetric methods for iron, arsenic, and heavy metals. Accurate execution of these testing methods is critical for certification.
Preguntas frecuentes
What products are regulated under GB 6853-2008?
This standard regulates pH primary reagent potassium dihydrogen phosphate, a chemical used as a benchmark for pH measurement in laboratories.
Are the requirements in GB 6853-2008 mandatory?
Yes, Chapter 4 and clause 5.3 are mandatory, while other clauses are recommended. Compliance with the mandatory specifications is required for market access.
What are the main updates in GB 6853-2008 compared to the 1986 version?
The 2008 version adjusts the pH(S)II value tolerance and updates testing methods for pH, insoluble matter, ammonium, and heavy metals to align with general chemical reagent testing standards.
The summary above provides a high-level overview of GB 6853-2008. 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 6853-2008 today to access all detailed parameters, tables, and testing procedures.
Indicaciones de aplicabilidad
- Tipo
- Producto
- CCS
- G61
- ICS
- 71.040.30
- Organismo competente
- Ministry of Industry and Information Technology
- Comité técnico
- Ministry of Industry and Information Technology
Relaciones
Sustituye a:GB 6853-1986