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在流动注射分析(以下简称FIA)中,进样方法主要有(1) 注射器隔膜进样法;(2) 旋转进样阀插入法;(3) 流体动力注入法;(4) 受控分散分析的泵吸入法。旋转阀进样简便,灵活,进样体积重现性好,是最常用的进样方法。由Ruzicka等人提出的流体动力注入技术是一种无阀采样注入方法,它克服了旋转进样阀长期旋转造成的磨损、堵塞和泄漏,适合于在线分析。但其系统的流体动力平衡不易调节,易出现试样连续不断地随着载流进入反应管道造成干扰,使记录蜂变形,拖尾或干脆无法进行正常测定。高瞻提出用一台泵和数个逆止阀(即单向阀)来完
In flow injection analysis (FIA), the main injection methods are: (1) syringe diaphragm injection method; (2) rotary injection valve insertion method; (3) hydrodynamic injection method; (4) controlled dispersion analysis Pump suction method. Rotary valve injection simple, flexible, reproducible injection volume, is the most commonly used injection method. The hydrodynamic injection technique proposed by Ruzicka et al. Is a valveless sample injection method that overcomes the wear, clogging and leakage caused by long-term rotation of a rotary injection valve and is suitable for on-line analysis. However, its system of hydrodynamic balance is not easy to adjust, prone to continuous samples with the carrier flow into the reaction pipe interference, the record bees deformation, trailing or simply can not be normal determination. Takanodou proposes to use one pump and several check valves (ie check valves) to finish