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借助于沸水浴里加热钨（Ⅵ）、氧化的苏木色精及抗坏血酸的酸性溶液，提出了一种高灵敏 的分光光度法测定痕量钨．文中研究了测定钨的适宜条件。此显色液的最大吸收波长处于４５５ｎｍ， 遵守比尔定律为１０ｍ１溶液中含０．１～０．５微克钨，表现摩尔吸光系数达１．８２ ×１０～６．然而，这灵敏度 与不同来源的苏木色精和氧化的苏木色精溶液的配制方法有关。在２×１０～（－３）ＭＮＨ４Ｆ存在下，许多微 克量级的金属离子不影响，但Ｍｏ（Ⅵ）、Ｎｂ（Ⅴ）及Ｔａ（Ⅴ）干扰严重。
A highly sensitive spectrophotometric method for the determination of trace tungsten was proposed by means of heating an acidic solution of tungsten (Ⅵ), oxidized hematoxylin and ascorbic acid in a boiling water bath. In this paper, the appropriate conditions for the determination of tungsten were studied. The maximum absorption wavelength of this color-developing solution is at 455nm, which obeys Beer’s Law to 10m1 solution containing 0.1-0.5 micrograms of tungsten and exhibits a molar absorption coefficient of 1.82x10-6. However, this sensitivity is related to the formulation of different sources of hematoxylin and oxidized hematoxylin solution. In the presence of 2 × 10 ~ (-3) MNH4F, many micrograms of metal ions do not affect but Mo (Ⅵ), Nb (Ⅴ) and Ta (Ⅴ) interfere seriously.