光譜分析所用粉末試样在瑪瑙乳鉢中研混时間较长,一般需15～20分钟,对于1:5、1:10、2:20等各种试样与基体(或緩冲剂,內标等)的比例經常出現不均匀現象。为了提高均匀性,縮短研混时间,我們采用了加入易揮发溶剂丙酮、乙醇或石油醚等,其中丙酮最好,每500毫克样品(试样加缓冲剂及内标等总和)加1～2毫升丙酮,每个样品只需3～5分钟即可研混好。 Spectral analysis powder sample used in the agate mortar for a long time, usually takes 15 to 20 minutes for 1: 5, 1:10, 2:20 and other samples and matrix (or buffer, such as internal standard ) Ratio often appear uneven phenomenon. In order to improve the homogeneity and shorten the mixing time, we use acetone, ethanol or petroleum ether as the volatile solvents, among which the best acetone is 1 ~ 500mg per 500mg sample (the total amount of buffer, internal standard, etc.) 2 ml of acetone, each sample just 3 to 5 minutes to mix well.