Chinese Journal of Chromatography ›› 2018, Vol. 36 ›› Issue (8): 822-826.DOI: 10.3724/SP.J.1123.2018.03011

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Fabrication of conventional ion chromatography-capacitively coupled contactless conductivity detector

CHEN Xiaohua1, HOU Yanjie1, YANG Bingcheng1, AI Lei2   

  1. 1. School of Pharmacy East China University of Science and Technology, Shanghai 200237, China;
    2. Suzhou Minghao Chromatographic Corperation, Suzhou 215500, China
  • Received:2018-03-11 Online:2018-08-08 Published:2014-06-28
  • Supported by:

    National Natural Science Foundation of China (No.21477037).

Abstract:

A conventional ion chromatography-capacitively coupled contactless conductivity detector (IC-C4D) was fabricated. The main parameters, such as the electrode length and gap, tube material and inner diameter, excitation frequency, voltage and waveforms, were optimized. The self-made C4D showed comparable performance to that of a commercial contact conductivity detector. Under the suppressed mode, the limits of detection of common inorganic anions (F-, Cl-, NO2-, Br-, NO3-, and SO42-) were 0.02-0.08 μmol/L. The relative standard deviations (RSDs) for the peak area were less than 1.8% (n=6). The linearities of the six common inorganic anions were achieved in the range of 0.1-10 μmol/L with correlation coefficients (R2)>0.9950. The advantages of such a C4D in a relatively conventional mode include simple structure, low fabrication cost and no electrode fouling, and it will help extend the application of IC.

Key words: anions, capacitively coupled contactless conductivity detector (C4D), ion chromatography (IC), signal-to-noise ratio (SNR)

CLC Number: