【摘要】 <正> 比色法测定矿样中低含量钨、钼,常用硫氰酸盐法进行分别测定。但此法灵敏度欠佳。对于<0.01％以下的样品的分析结果不好。目前以水杨基萤光酮-溴化十六烷基三甲基铵显色体系灵敏度最高,但钨、钼相互干扰,钛也有严重干扰,常采用预分离或还原络合掩蔽来消除干扰。至今尚未见到有关矿样分析中对低于0.01％钨、钼同时测定的比色法的报导。本文利用钨、钼相互干扰的特点,用双波长分光光度法同时测定钨、钼。运用电子计算机选更多还原

【Abstract】 A method of dual-wavelength spectrophotometry employing computer to select the optimum pairs of wavelength is proposed for simultaneously quantitative determination of trace tungsten and molybdenum in ores, using Na₂O₂ to melt the sample, and colour complexes of W-salicyfluorone-cetyltrimethyl and Mo-salicyfluorone-cetyltrimethyl in 0.6N HC1. The measuring wavelength and referential wavelength are 514 nm and 530 nm for W, 526 nm and 510 nm for Mo. The calibration curves are linear in the range 0 to 20 μg/25 ml for W, and 0 to 6μg/25 ml for Mo. The standard deviations and relative standard deviations are 0.001% and 0.01 resDectivelv for WO₃, 0.002% and 0.06 for MO.更多还原