The analysis of PO43- in industrial furnace water is generally "sulfur-molybdenum-partial" colorimetric method.When the concentration of N2H4in the boiler water is high,phosphorus-vanadium molybdate produced by PO43- PO43- color development failure,the first water samples can be oxidized to add N2H4oxidation,and then eliminate the oxidant reduction,and finally by "sulfur-molybdenum-partial" colorimetric analysis.%工业炉水中PO43-分析一般为"硫-钼-偏"比色法,当炉水中有较高浓度N2H4时,PO43-显色产生的磷钒钼黄容易被N2H4还原显蓝色,导致PO43-显色失败,可采用先向水样中加入氧化剂把N2H4氧化,再将氧化剂还原消除,最后按"硫-钼-偏"比色法进行分析.
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