Definitions
The ion chromatography is an efficient liquid chromatography, which is also called the high ion chromatography. Hpic or modern ion chromatography, distinct from the traditional ion exchange chromatographic column chromatography, consists mainly of resins with high interconnectivity and low exchange capacity, with very small input sizes, and the delivery of lymph fluids from piston pumps usually involves the conduct of on-line automatic continuous conductive detection of the evaporation fluid。
Rationale
The rationale for separation is based on the difference between the reversible exchange and analysis of the relative strength of the exchange agent between the desolable ion on the ion exchange resin and the soluble ion with the same charge in the flow phase. It applies to the separation of water-prejudice and anion。
For example, following the separation of several anion, the sample solution is first exchanged directly with the ion exchange position of the analytical column (i. E. Retained on the column), e. G. F-, cl- and so42- in the sample of lymph analysis by naoh, where the anion retained on the column is replaced and removed from the column. The ion for resin proxies and weak powers is washed off before the ion for resin prophylactics and strength, i. E. The ion chromatography separation process, the leaching fluid passed through the chemical inhibitor, and the background conductor from the rinsing fluid was kept to a minimum, so that when the subject leaves the chamber, there is a larger, accurately measurable electrical signal。
Purpose
Ion chromatography is used primarily for the analysis of environmental samples, including surface water, drinking water, rainwater, household and industrial effluents, anion and anion in acidic sediments and atmospheric particles, and trace impurities in reagents related to the water and microelectronics industries。
In addition, it is widely applied in areas such as food, sanitation, petrochemicals, water and geology。
Common ions frequently tested
Anion: f-, cl-, br-, no2-, po43-, no3-, so42-, acetate, herbic acid, etc。
Anion: li+, na+, nh4+, k+, ca2+, mg2+, cu2+, zn2+, fe2+, fe3+, etc。
The ion chromatography method, which is common to ion chromatography separation determinations, is its specialty, with a single sample in which seven common ion determinations can be obtained within approximately 20 minutes, which cannot be achieved by other means of analysis, and the ion chromatography method for anion does not show any superiority compared to aas and icp methods。
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