【摘要】 通过对氰化钠溶液和氢氧化钠溶液的紫外光谱分析,提出了一种新的氰化物在线检测方法,即直接对NaCN和NaOH混合溶液进行紫外分析来获取CN-的浓度。为此设计建立了一个紫外光电检测系统。光源采用氘灯,自行设计了氘灯电源,色散分光元件采用光栅,探测器选用光电倍增管(PMT)。比较以往的氢离子检测方法,本方案提供了一种高效、轻便的智能化在线检测技术。结果表明:在紫外线216 nm处,NaOH溶液的光吸收最大,当氰离子浓度为1-70 mg／L,吸收度满足良好的线性,测量精度达1 mg／L。更多还原

【Abstract】 By the analyse of ultraviolet spectrum of NaCN and NaOH solution, a new simultaneous determination method for cyanide is put forward, getting consistency of CN- by the direct analyses of ultraviolet spectrum of NaCN and NaOH mixed solution. An ultraviolet photoelectric measurement system is designed. The system is composed with deuterium lamp, dispersive grating and PMT. This is an efficient and light simultaneous determination method. Results indicate that the spectrum of NaOH solution has a peak at 216 nm. When the cyanide ion concentration is between 1 and 70 mg/L, the absorbency curve is linear with measurment precision of 1 mg/L.更多还原