介绍了一种油气田缓蚀剂浓度现场检测方法和移动式在线分析仪，该分析仪采用紫外（UV）光谱和显色剂技术测量油田产出液中缓蚀剂的残余浓度。仪器以长寿命脉冲氙灯作光源，单色器为衍射光栅后分光，通过光栅将紫外光导入到流动比色池中，透射光再通过光纤导入光电二极管阵列（PDA）。分析仪在微处理器控制下，可以对油田产出液进行快速UV光谱扫描和残余缓蚀剂浓度测量。为防止污水中的残余油污污染流动比色池，监测仪前端采用过滤柱进行初步油水分离，分离后流体由蠕动泵自动压入流动比色池进行UV光谱分析，通过先期建立的吸光度-浓度标准曲线，再由流水的吸光度计算水中的缓蚀剂残余浓度。

An on-site detection method of corrosion inhibitor concentration in oil and gas fields and a mobile on-line analyzer are introduced. The analyzer uses ultraviolet (UV) spectroscopy and chromogenic agent technology to measure the residual concentration of corrosion inhibitor in oilfield produced liquid. The instrument uses a long-life pulsed xenon lamp as the light source, and the monochromator is a diffraction grating. The ultraviolet light is introduced into the flow colorimetric cell through the grating, and the transmitted light is introduced into the photodiode array (PDA) through the optical fiber. Under the control of microprocessor, the analyzer can perform rapid UV spectral scanning and residual corrosion inhibitor concentration measurement on oilfield produced fluid. In order to prevent the residual oil in the sewage from polluting the flow colorimetric tank, the front end of the monitor uses a filter column for preliminary oil-water separation. After the separation, the fluid is automatically pressed into the flow colorimetric tank by a peristaltic pump for UV spectral analysis. The absorbance-concentration standard curve was established in advance, and then the residual concentration of the corrosion inhibitor in the water was calculated from the absorbance of the running water.