油田污水中HGY-9B缓蚀剂的浓度检测

Concentration determination of HGY-9B corrosion inhibitor in producing well water

分别利用紫外光谱和光度法对油田污水中低浓度的咪唑啉类缓蚀剂HGY-9B进行了检测。结果表明,紫外光谱法和光度法(两种显色剂)均能很好地检测3%NaCl溶液中HGY-9B缓蚀剂的浓度,但是在油田污水中,紫外光谱法已无法检测,光度法中显色剂A也不适用,而显色剂B能够较好地检测污水中HGY-9B缓蚀剂浓度,相对误差较小。

Low concentration of HGY-9B corrosion inhibitor with imidazoline as essential constituent in producing well water was determined by ultraviolet photometer and coloring photometric method.The results show that both ultraviolet photometric method and coloring photometric method using different coloring agents A and B can detect the concentration of HGY-9B inhibitor in 3% NaCl solution.But neither the ultraviolet photometric method nor the coloring photometric method with agent A is suitable for the producing well water.The coloring photometric method using agent B is able to determine the concentration of HGY-9B corrosion inhibitor in the producing well water with low relative error.