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用丁酮/氯仿溶剂萃取分离基体后,在水相中用原子吸收光谱法测定4—5个9的高纯金中20个痕量杂质元素。火焰法用于测定Cu,Fe、Pb、Ni、Co、Mn、Cd、Cr、Pd、Rh、Zn。用石墨炉法测定 As、Sb、Sn、Bi、Al、Se、Te、V、Pt。测定范围为1×10~(-4)-<1×10~(-6)%。分析步骤如下:称取0.500g 金置于50ml 聚四氟乙烯离心管中,同时做空白试验,试样用(1+1)硝酸酸洗后用水洗净。加入2ml 王水,用红外加热溶解,把溶液蒸发到湿盐状,残渣用
After separation of the matrix with butanone / chloroform solvent extraction, 20 trace impurities in 4-5 9 high purity gold were determined by atomic absorption spectrometry in the aqueous phase. Flame method for the determination of Cu, Fe, Pb, Ni, Co, Mn, Cd, Cr, Pd, Rh, Zn. Determination of As, Sb, Sn, Bi, Al, Se, Te, V and Pt by Graphite Furnace Method. The measurement range is 1 × 10 -4 (1 × 10 -6%). Analysis steps are as follows: Weigh 0.500g gold placed in 50ml Teflon centrifuge tube, while doing a blank test, the sample was (1 + 1) pickling and washed with water. Join 2ml aqua regia, dissolved by infrared heating, the solution was evaporated to wet salt, the residue used