Letter to the editors

Jc, Ireland; La, Moore; Pourmoghaddas, Hossein; Aa, Stevens

doi:10.1002/bms.1200170612

Cited by 18 publications

(3 citation statements)

References 10 publications

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“…The authors also assigned incorrect ion fragments to these m/z values of Table 2 in their paper. 8 There were several addition m/z fragments in the spectra reported earlier that were not observed in this study. These could not be assigned to logical fragments and may be attributable to sample impurities.…”

Section: Resultsmentioning

confidence: 40%

Mass spectra of synthesized mixed bromochloroacetic acids

Xie

Rajan

Reckhow

1992

Org. Mass Spectrom.

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Mass spectra of methyl esters of ,three common drinking water chlorination by-products, bromodichloroacetic acid, dibromochloroacetic acid and tribromoacetic acid, are presented. The spectra are obtained in electron impact and chemical ionization modes, using a quadrupole mass spectrometer. Proposed fragment ion assignments are presented in detail. Fragment clusters were identified from their rn/z values and confirmed with their relative isotope ratios. The detailed mass spectra presented are especially useful because standards for these drinking water contaminants are not yet commercially available.

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Section: Resultsmentioning

confidence: 40%

Mass spectra of synthesized mixed bromochloroacetic acids

Xie

Rajan

Reckhow

1992

Org. Mass Spectrom.

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“…A maximum contaminant level (MCL) of 60 mg/L for the total of five HAAs (monochloroacetic, monobromoacetic, dichloroacetic, dibromoacetic, trichloroacetic acid) in drinking water has been proposed by the US Environmental Protection Agency (EPA) [18]. Current methods for the determination of HAAs are mostly based on gas chromatography (GC), which involves the esterification of the acids [19,20]. There have been some attempts to use CE to determine HAAs, but full separation could not be obtained because of the small differences in their molecular sizes, as well as their mass-to-charge values that result in similar mobilities.…”

Section: Introductionmentioning

confidence: 99%

Effect of NaOH on large‐volume sample stacking of haloacetic acids in capillary zone electrophoresis with a low‐pH buffer

Zhu

Ang

et al. 2003

Electrophoresis

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Large-volume sample stacking (LVSS) is an effective on-capillary sample concentration method in capillary zone electrophoresis, which can be applied to the sample in a low-conductivity matrix. NaOH solution is commonly used to back-extract acidic compounds from organic solvent in sample pretreatment. The effect of NaOH as sample matrix on LVSS of haloacetic acids was investigated in this study. It was found that the presence of NaOH in sample did not compromise, but rather help the sample stacking performance if a low pH background electrolyte (BGE) was used. The sensitivity enhancement factor was higher than the case when sample was dissolved in pure water or diluted BGE. Compared with conventional injection (0.4% capillary volume), 97-120-fold sensitivity enhancement in terms of peak height was obtained without deterioration of separation with an injection amount equal to 20% of the capillary volume. This method was applied to determine haloacetic acids in tap water by combination with liquid-liquid extraction and back-extraction into NaOH solution. Limits of detection at sub-ppb levels were obtained for real samples with direct UV detection.

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“…In this fashion, bromoacetates and bromochloroacetates are also formed. The formation of these species due to the action of halogen oxidants upon natural organic matter (NOM) has been the focus of many studies. − In particular, a number of compounds that degrade to give chloroform have been identified . However, trichloroacetate was not listed among them.…”

Section: Introductionmentioning

confidence: 99%

The Fate of the Haloacetates in Drinking WaterChemical Kinetics in Aqueous Solution

Urbansky

2001

Chem. Rev.

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Letter to the editors

Cited by 18 publications

References 10 publications

Mass spectra of synthesized mixed bromochloroacetic acids

Mass spectra of synthesized mixed bromochloroacetic acids

Effect of NaOH on large‐volume sample stacking of haloacetic acids in capillary zone electrophoresis with a low‐pH buffer

The Fate of the Haloacetates in Drinking WaterChemical Kinetics in Aqueous Solution

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