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Citation: CHEN Xiaohua, HOU Yanjie, YANG Bingcheng, AI Lei. Fabrication of conventional ion chromatography-capacitively coupled contactless conductivity detector[J]. Chinese Journal of Chromatography, ;2018, 36(8): 822-826. doi: 10.3724/SP.J.1123.2018.03011 shu

Fabrication of conventional ion chromatography-capacitively coupled contactless conductivity detector

1.
School of Pharmacy East China University of Science and Technology, Shanghai 200237, China;
2.
Suzhou Minghao Chromatographic Corperation, Suzhou 215500, China

Received Date: 11 March 2018

Fund Project: National Natural Science Foundation of China (No.21477037).

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 SO₄^2-) 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.
- ion chromatography (IC),
- capacitively coupled contactless conductivity detector (C⁴D),
- signal-to-noise ratio (SNR),
- anions
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