Based on the gradient dilution technique of FIA, a new standard addition method is established. Concentration gradient can be formed by injection of only one single standard solution.
根据FIA梯度稀释技术建立了一种新的标准加入方法，只需要注入一种标准溶液，就能形成浓度梯度。
For the injection mode, the invention provides a reciprocating single-screw type structure and an extrusion one-line type injection structure.
在注射方式上，本发明提供了两种形式，一是往复单螺杆式，二是挤压一线式注射结构。
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