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本文介绍合成二硫代二安替吡啉甲烷的方法试验,在质量(熔点274℃,文献为255℃和237℃)和产量上超过文献报导,简化了合成步骤。本文着重探讨该试剂与铋显色时的条件,克分子吸收系数为1.0×10~4,灵敏度比硫脲法高一倍多。络合物稳定24小时,温度在8—40℃吸光度不变,试验了29种离子对铋的影响,按文献在0.2—2N硫酸中显色,铁、锡、铅、砷、锑、钼、铜等干扰严重、须作繁琐的分离。经试验发
This article describes a method for the synthesis of dithiodistilmene methane, which has been reported in the literature for mass (melting point 274 ° C, literature 255 ° C and 237 ° C) and yield, simplifying the synthesis procedure. This article focuses on the reagent and bismuth color conditions, the molecular absorption coefficient of 1.0 × 10 ~ 4, the sensitivity of more than double the thiourea method. The complex was stable for 24 hours and its temperature was kept constant at 8-40 ° C. The effects of 29 ions on bismuth were tested. According to the literature, the color was developed in 0.2-2N sulfuric acid, and the contents of iron, tin, lead, arsenic, antimony, molybdenum, Copper and other serious interference, to be tedious separation. After the test hair