GB12596-2008

Working chemical - Calcium carbonate

工作基准试剂碳酸钙

GB 12596-2008 は現行の中国強制国家規格です：Working chemical - Calcium carbonate。業界：電子。テーマ：製品安全。施行日：2009年6月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

This standard applies to working chemical calcium carbonate used as a working基准 reagent in titration analysis. It is specifically designed for high-purity chemical reagents utilized in laboratory analytical processes. It is not applicable to industrial-grade or general-purpose calcium carbonate. The standard outlines the essential properties, specifications, and testing protocols for this specific analytical grade material.

技術要求

The standard defines stringent specifications for calcium carbonate reagents, with mandatory clauses concerning its assay content and specific testing protocols. The primary chemical requirements include strict limits on the main content (CaCO3) to ensure a highly pure baseline for titration. Manufacturers must ensure the content falls within an extremely narrow mass fraction range to meet the working基准 grade. Additionally, the standard regulates physical and chemical parameters such as clarity, loss on drying, and alkalinity. It also sets strict maximum limits for various impurities, including chlorides, sulfates, total nitrogen, magnesium, iron, and heavy metals (as Pb). Compliance with these impurity thresholds is critical for preventing interference in analytical titrations.

試験方法

The standard outlines various analytical testing methods to verify compliance. The primary content determination is performed using an EDTA titrimetric method, adhering to the general rules for weighing titration. Specific gravimetric and titrimetric procedures are mandated for assay verification. Impurity testing utilizes standard chemical analysis methods, including nephelometry and colorimetry for substances like chlorides, sulfates, and iron. Flame atomic absorption spectrometry is specified for determining magnesium content, following the general rules outlined in GB/T 9723. Furthermore, standard procedures for determining loss on drying and alkalinity are detailed to ensure physical and chemical stability.

よくある質問

What products are regulated under GB 12596-2008?

It applies to working chemical calcium carbonate used specifically for titration analysis in laboratories. It does not apply to industrial-grade or general-purpose calcium carbonate.

Are there any updates from the previous version of GB 12596-2008?

The updated version revised the determination method for content, changed the standard name, and removed the previous Appendix A regarding the preparation of reference solutions.

How does GB 12596-2008 differ from ISO standards?

The standard references several ISO standards, such as ISO 6353-1:1982 for impurity determination and ISO 3696:1987 for laboratory water, indicating a high degree of alignment with international chemical reagent specifications.

The summary above provides a high-level overview of GB 12596-2008. 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 12596-2008 today to access all detailed parameters, tables, and testing procedures.

適用のヒント

種別: 製品
CCS: G61
ICS: 71.040.30
所管部門: Ministry of Industry and Information Technology
技術委員会: Ministry of Industry and Information Technology