GB20814-2014

Limit and determination of the quantity of heavy-metal elements in dye products

染料产品中重金属元素的限量及测定

GB 20814-2014 ist eine gültige verbindliche chinesische Nationalnorm: Limit and determination of the quantity of heavy-metal elements in dye products. Branchencluster: Elektronik. Schwerpunkt: Produktsicherheit. Inkrafttreten: 1. Mai 2015.

Die Anwendbarkeit hängt vom Produktumfang, dem Zertifizierungsweg, Bekanntmachungen der Behörden und Übergangsregeln ab. Fordern Sie eine Übersetzung an oder prüfen Sie die Quelle, bevor Sie diesen Eintrag für Compliance-Entscheidungen nutzen.

Compliance-Überblick

Dieser Überblick ist derzeit nur auf Englisch verfügbar.

Geltungsbereich und Anwendbarkeit

This standard specifies the allowable limits and determination methods for 12 heavy-metal elements in dye products. It is applicable to all forms of commercial dyes, including liquid dyes and coating pastes. Manufacturers must ensure their dye products comply with these limits before entering the Chinese market. It replaces the previous version, GB 20814-2006, by adding limits for arsenic (As) and mercury (Hg).

Technische Anforderungen

The standard establishes strict maximum limits for 12 specific heavy metals, including cadmium (Cd), chromium (Cr), lead (Pb), and nickel (Ni), among others. For liquid products, these limits must be calculated based on their solid content. Compliance with these specific concentration thresholds is mandatory for all commercial dyes. However, the standard notes an exception: for certain dye products where a heavy metal is an inherent part of the molecular structure, the quantity of that specific element may not be assessed. The technical framework also references GB/T 6682-2008 for water specifications and GB/T 8170-2008 for numerical rounding rules.

Prüfverfahren

The primary testing method involves digesting the dye sample using a mixed acid solution, followed by analysis using an Atomic Absorption Spectrometer (AAS). The standard outlines two main sample preparation techniques: microwave digestion and wet digestion. Different measurement techniques are specified for various elements: the flame method is used for elements like Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn, while the hydride generation method is required for As, Hg, and Sb. Laboratories must follow these specific preparation and instrumental procedures to ensure accurate compliance testing.

Häufige Fragen

What products are regulated under GB 20814-2014?

GB 20814-2014 regulates all forms of commercial dye products, including solid and liquid dyes as well as coating color pastes. It applies to any dye product intended for the Chinese market.

Are there any updates from the previous version of GB 20814?

Yes, compared to GB 20814-2006, this 2014 version changes the title and adds specific limits for arsenic (As) and mercury (Hg). It also updates the reagents, equipment, and standard working solution preparation methods.

How are heavy metals tested according to this standard?

Heavy metals are tested by digesting the dye sample with acid and then using an Atomic Absorption Spectrometer. The standard specifies the use of the flame method for most elements and the hydride method for arsenic, mercury, and antimony.

The summary above provides a high-level overview of GB 20814-2014. To ensure complete compliance for your dye 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 20814-2014 today to access all detailed parameter tables, digestion procedures, and testing conditions.

Hinweise zur Anwendbarkeit

Normtyp: Produkt
CCS: G57
ICS: 71.100.01, 87.060.10
Zuständige Behörde: Ministry of Industry and Information Technology
Technisches Komitee: Ministry of Industry and Information Technology

Normbeziehungen

Ersetzt:GB 20814-2006