Quantitative Test Method on Content of Wax in Jadeite Jade
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摘要: 根据最新版国家标准(GB/T16552—2003),浸蜡的翡翠归为处理类。上蜡是翡翠加工中一项必不可少的工序。对含蜡翡翠究竟定义为传统的优化(“A货”)还是人工处理(“B货”)类型的判定问题,迄今仍众说纷纭。因此,测定翡翠中蜡的质量分数成为了其鉴定的重点。通过配置含不同质量分数川蜡的翡翠的KBr压片样品以及测定支配样品的红外光谱,运用基线法求出川蜡在2 919 cm-1处的吸光度,得出其质量分数(C)与吸光度/KBr压片厚度(E/L)之间的关系方程式:E/L=1 334.5C-0.068,提出了翡翠中川蜡质量分数的定量测试方法。Abstract: According to the newest national standard(GB/T 16552——2003),the jadeite jade by waxing treatment should be classified to the artificial treatment type.Waxing is a necessary procedure in the manufacture of jadeite jade.The determinant problem whether the waxed jadeite jade is defined into the traditional enchancing("A-jade") or the artificial treating("B-jade") is troublesome at present.So,the method for testing the content of wax in jadeite jade is quite important.In the paper,a series of KBr disc samples allocated with different content of wax in jadeite jade are tested by using the infrared spectrometer.The absorbency of the wax at 2 919 cm-1 is calculated by the method of baseline,and the formula is E/L=1 334.5C-0.068,which stands for the relation equation about the content of wax(C) and absorbency of wax / thickness of KBr disc samples(E/L).This formula could be used for the quantitative calculation of the content of wax in jadeite jade.
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Keywords:
- jadeite jade /
- wax /
- content /
- infrared spectrum
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