Simultaneous ion chromatographic determination of anions and cations by series conductivity and flame photometric detection

✍ Scribed by Wolfgang Frenzel; Dietrich Schepers; Gerhard Schulze

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 832 KB
• Volume: 277
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)85095-2

✦ Synopsis

AbStIWt

A method for the simultaneous determination of anions and cations using non-suppressed ion chromatography (NSIC) is proposed. Anions are separated on an ion-exchange column and determined with conductivity detection. In the same run the non-retained cations leaving the chromatographic system as a discrete sample zone are detected by a multi-element flame emission spectrometer which is coupled directly to the outlet. The principal analytical features of the proposed method are discussed and the er+erimental requirements of interfacing the two detection methods are outlined. System performance is evaluated for the high-speed NSIC of chloride, nitrate and sulphate and the multi-channel flame emission spectroscopic detection of sodium, potassium and calcium. The figures of merit are given and application to the analysis of tap, surface and mineral waters is presented.