1. Assuring precision and calibration linearity in ultrasensitive suppressed ion chromatography by using deliberately contaminated hydroxide eluent
- Author
-
Dong Soo Lee, Jiwon Eom, and Gahyeon Lee
- Subjects
Calibration curve ,Ion chromatography ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Analytical Chemistry ,Ion ,chemistry.chemical_compound ,Fluorides ,Column chromatography ,Limit of Detection ,Hydroxides ,Carbonic acid ,Detection limit ,Chromatography ,Organic Chemistry ,Benzenesulfonates ,Water ,General Medicine ,021001 nanoscience & nanotechnology ,Chromatography, Ion Exchange ,0104 chemical sciences ,chemistry ,Calibration ,Carbonic Acid ,Hydroxide ,0210 nano-technology ,Fluoride - Abstract
and theoretical studies were conducted to investigate low and non-linear responses in sub-micro molar-level suppressed ion chromatography with a hydroxide eluent. A calculated response was derived using experimentally determined detector effluent ion composition data and compared with measured experimental responses. The calibration curve was non-linear, and its slope varied considerably with different instrumental setups and operating conditions. The non-linearity of the solution conductivity response was determined by two acid-base equilibria of water and carbonic acid, and fluoride ion. By using eluent contaminated with para-toluene sulfonate at micro molar level, the non-linear response was greatly alleviated.
- Published
- 2017