Ion chromatographic determination of anions in wastewater precipitate

Green, L. W.; Woods, John R.

doi:10.1021/ac00237a010

Cited by 22 publications

(1 citation statement)

References 13 publications

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“…Ion chromatography developed by Small et al (1) is a very effective method for the analysis of many common anions (1-10) and cations (1,(11)(12)(13)(14). The anion chromatographic system, which consists of a carbonate eluent and a suppressor system, has been widely applied for routine work in various fields (2)(3)(4). However, two-negative peaks, called "water dip" and "carbonate dip", were observed on a suppressed chromatography, and they interfered with the determination of some anions (15).…”

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confidence: 99%

Formation mechanism of dip peaks in nonsuppressed ion chromatography

Okada¹,

Kuwamoto²

1984

Anal. Chem.

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The two dip peaks which were observed In nonsuppressed anion chromatography by using low pH eluent were Investigated In detail by conductivity and UV spectrophotometric detectors. The eluent anion fixed on the Ion-exchange resin was transferred to the sample water zone, and this rate was especially fast at the low pH of the eluent. Consequently, the first dip peak was caused by the Ion exclusion effect of the sample cation from the anion exchange resin and by the elution of the sample water. The second dip peak was caused by the "compensating effect" for the first dip zone and by the "absent effect" of the eluent anion eluted at the position of the second dip peak.

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