K金首饰中镍含量与镍释放量关系研究

Relationship between Nickel Content and Nickel Release in Karat Gold Jewelry

我国的K金首饰包括9K、14K、18K、22K几类,通常K金首饰是在主体为黄金的基础上按照一定比例含量掺入部分杂质元素,若其中的镍含量过高发生镍释放,可能导致佩戴人过敏。采用XRF荧光光谱仪检测饰品中的含镍量,研究K金饰品含镍量值与镍释放量间的关系。设定定性方法测试K金首饰中镍含量5%为镍释放量的阴性值的阀值,筛选K金首饰的镍释放量是否符合要求,再确定进行镍释放量定量检测。结果表明,对于饰品镍含量〈5%的产品,可以不进行镍释放量的检测;对于饰品镍含量5%~10%的产品,可以选择部分产品进行镍释放量检测;对于饰品镍含量〉10%的产品,都需要定量检测镍释放量。

Karat gold jewelry including 9K, 14K, 18K and 22K in China. Usually, Karat gold jewelry is made up of gold mixed with some impurity elements. Nickel can release from the high nickel content jewelry, and it can cause allergy. The relationship between the content of nickel and nickel release quantity of the karat gold were set up after the content of nickel was detected by XRF. Set a threshold of nickel release quantity of 5% in qualitative methods to test karat gold jewelry. Quantitative detect the nickel release quantity of the filtered karat gold jewelry. The results showed that, it is unnecessary to detect nickel release quantity when nickel content in Karat gold jewelry is less than 5%, part of the nickel release quantity should be detected when nickel content ranged 5%-10%, and the nickel release quantity must be detected when nickel content is higher than 10%.