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1·Trivalcnt chromium was oxidized to hexavalent chrome by alkaline potassium persulfate under high -temperature. Then total chromium was measured by colorimetry.

在高温下，用碱性过硫酸钾溶液将水样中三价铬氧化为六价铬，比色测定总铬。

2·Hexavalent chrome is reduced to trivalent chrome by morpholine under high temperature conditions. Then morpholine content is calculated by detecting the absorbance of trivalent chromic ion.

吗啉在高温下将六价铬还原为三价铬，通过测定三价铬离子的吸光度，计算出锅炉给水中吗啉含量。