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- W2081982108 abstract "A new arrangement of a flow-through polarographic detector has been designed with a rapidly dropping mercury electrode. The detector is especially usefull for reversed-phase high-performance liquid chromatography (HPLC). It has been shown that the properties of the detector are similar to those of a UV detector operated at 254 nm. An electroactive substance in the eluate can be determined at flow-rates not exceeding 6 ml min−1. An upwards direction of flow of the solution facilitates the automatic removal of gas bubbles, which are swept to the detector with the column effluent. The volume of solution necessary to wash out 95% of the detection passage filled with another solution is about 0.1 ml, which is approximately equal to the volume when using a UV (254 nm) detector with a geometrical volume of the detection passage of 8 μl. The detector sensitivity with injection of cadmium nitrate solution is (3.6 ± 0.4)·10−4 A 1 mol−1, and the linear dynamic range is 5·10−4–5·10−2M cadmium nitrate with 5-μl injections. The selection of a suitably short drop time at a given flow-rate enables one to eliminate current signal disturbances on the recorded curves. Thus the current is diffusion or convective-diffusion controlled, irrespective of the presence or absence of turbulence. The application of the detector to HPLC is illustrated with the separation of a mixture of testosteroids." @default.
- W2081982108 created "2016-06-24" @default.
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- W2081982108 date "1980-04-01" @default.
- W2081982108 modified "2023-09-27" @default.
- W2081982108 title "Polarographic detection for high-performance liquid chromatography using a flow-through detector" @default.
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- W2081982108 doi "https://doi.org/10.1016/s0021-9673(00)86363-3" @default.
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