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对聚三氟氯乙烯-磷酸三丁酯反相萃取色谱富集(分离)金已有许多报导,但介绍的解脱液如浓硝酸、亚硫酸钠,硫代硫酸钠、硫脲等都有共同缺点:解脱液不能直接用于化学测定金。本报告探讨了用pH6的2％磷酸氢二钠热溶液在柱温90°左右解脱金,并采用二硫代吡啉甲烷于水相中直接显色分光光度法测定(高含量也可用氢醌容量法测定),从而克服了其他解脱液的缺点。本法对矿石中一些伴生元素进行分离,绝大部分分离效果较好,只有锑严重影响,对锑的影响我们采用在试样分解前焙烧除去部分。另外钒的干扰较严重,对含钒试样有待进一步研究解决。经过标样和矿样的分析对照证明,分析结果较满意。
There have been many reports on the enrichment (separation) of gold by RP-HPLC extraction of polychlorotrifluoroethylene-tributyl phosphate. However, all of the known solutions such as concentrated nitric acid, sodium sulfite, sodium thiosulfate and thiourea have the following disadvantages: The decontamination solution can not be directly used for chemical determination of gold. This report explores the use of a 2% solution of sodium hydrogen phosphate in pH 6 to liberate gold at a column temperature of about 90 ° and the direct colorimetric determination of dithiopyrol in the aqueous phase (high levels are also available with hydroquinone Volumetric method), thus overcoming the shortcomings of other solution. This method separates some associated elements in the ore, most of the separation effect is better, only the serious impact of antimony, antimony we use the sample before the roasting to remove some. Another more serious interference of vanadium, vanadium-containing samples to be further studied and resolved. After the standard sample and sample analysis and control proved that the analysis results are more satisfactory.