波长色散X射线荧光光谱法测定黄金饰品含金量

本文提出应用波长色散Ｘ射线荧光光谱仪测定黄金饰品含金量的方法，本法对原有样品盒进行了改造，增设特制窗口和采取样品固定等措施，以系列参考标样建立校准曲线，用经验系数法校正基体效应。比例模拟法校正含量。９个参考标样和１６个金标牌的测定结果表明，在含金量为３７．５０％－９９．９９％的范围内，方法的准确度好：含金量在９９．９９％－９８．９８％范围时，误差为０．０３％－０．１２％，在９８．９８％－３７．５０％范围时，误差为０．０１％－０．５２％，选用含金量不同的５个参考标样为代表，以０．７和１．４的模拟比例，经不同时间多次测定进行统计，相对标准偏差为０．０５％－０．５０％，说明方法的精密度好，本法操作方便，时样品无破坏

Determination of Au in Gold Jewelry by WDXRF

Au in sold jewelry was analyzed by WDXRF proportional model with empirical coefficient method using a series of gold reference standards, in which the standard sample -cassette was changed and fitted out with special window -lining and sample-ficture. The analytical results of 9 gold reference standards and 16 standard gold bullions showed that the error was 0.03% -0.12% for 99.99%-98.98% gold samples and 0.01% 0.52% for 98.98% 37.50% those. The statistics of 5 gold reference standards in the ratios-0.7 & 1.4 of standard to asmple demonstrated that RSD% was 0.05%-0. 50%. The method was rapid, simple, and non-destrutive.