Simultaneous ion-exclusion chromatography-cation-exchange chromatography with conductimetric detection of anions and cations in acid rain waters

Indirect UV Detection-Ion-exclusion/Cation-exchange Chromatography of Common Inorganic Ions with Sulfosalicylic Acid Eluent

“…In this case, because the limiting molar conductivities of anions separated by ion-exclusion reaction are higher than that of the eluent, the peaks were detected in the positive direction. 1,18,19 The limiting molar conductivities in the positive direction increased with an increase of anion concentration injected. Inversely, the limiting molar conductivities of cations separated by cation-exchange reaction were lower than that of H + in the acidic eluent, and the peaks were thus detected in the negative direction.…”

“…Ion-exclusion/cation-exchange chromatography (IEC/CEC) on a weakly acidic cation-exchange resin using on acidic eluent, developed by Tanaka et al in 1994, has been employed to monitor the quality of environmental water samples such as acid rainwater and river water, to analyze body fluid samples such as saliva, and to evaluate water purification by photocatalytic materials. [1][2][3][4][5][6][7][8] One advantage of IEC/CEC is the ability to simultaneously separate common inorganic/organic anions and cations in a single run using a simple equipment configuration with just a single column, injection, elution, and detector.…”

“…[1][2][3][4][5][6][7][8] One advantage of IEC/CEC is the ability to simultaneously separate common inorganic/organic anions and cations in a single run using a simple equipment configuration with just a single column, injection, elution, and detector. In addition, the development of IEC/CEC is ongoing, and analytical performance has been improved for the purpose of analyzing water samples originating from various environments.…”

Study on Determination of Chemical Oxygen Demand in Water with Ion Chromatography

“…1 It has been used to separate the anions, organic acids and alkali metal cations, and it shows an incomparable advantage in the separation of inorganic anions. 2,3 It has been widely applied to the fields of environmental analysis, agriculture analysis, industry analysis, food analysis, clinical analysis, biochemical and pharmaceutical analysis, etc. 4 IC is used to determine the ordinary anions of surface water, groundwater, wastewater and drinking water in 4110 standard methods 5 of the United States of America.…”

“…After the oxidation has proceeded for a finite period of time, the initial concentration of organic species can be calculated by determining the amount of the remaining oxidizing agent. 20 Despite its widespread use, the traditional methods have several drawbacks: [21][22][23][24] (1) the analysis time is too long, about 2 h for digestion plus the time required for titration; (2) handling is detailed and requires considerable care, thus increasing the probability of errors; (3) consumption of expensive (Ag 2 SO 4 ) and toxic (HgSO 4 ) chemicals is quite high.…”