Determination of mono- and dichloroacetic acids in betaine media by liquid chromatography

Simultaneous determination of bromate, chlorite and haloacetic acids by two-dimensional matrix elimination ion chromatography with coupled conventional and capillary columns

“…The LODs for tap water samples were also determined to investigate the possible matrix impact, excellent detection limits were obtained ranged from 0.38 to 0.72 g/L as tabulated in Table 2. The detection limits with only 100 L injection volume are comparable or lower than those obtained by current standard methods [15][16][17][18][40][41][42][43][44][45][46][47] and other previously reported approaches [21][22][23][24][26][27][28][29][30][31][32]50] where many of them employed offline preconcentration or large volume injection to improve method sensitivity. Besides of the improvement in sensitivity, this method offers an advantage of allowing reliable detection of chlorite, bromate and HAAs in a single injection which in many cases simultaneous detection of these compounds are not possible.…”

“…These methods provide high recoveries and low detection limits, but the transfer, extraction and derivatization of samples make the methods complex, time-consuming, labor-intensive and require the use of toxic organic solvents. Several alternative separation methods have been reported for the determination of HAAs, such as capillary electrophoresis (CE) [21,22], ion-chromatography (IC) [23][24][25][26][27] and liquid-chromatography (LC) with UV detection [28,29] or with mass spectrometry (MS) [30][31][32]. Although these methods provide shorter analysis time and do not require derivatization compared to GC-based methods, off-line preconcentration of samples and large injection volume are needed to comply with the minimum reporting levels required by the regulatory agencies.…”

Rapid determination of nine haloacetic acids in water using ultra-performance liquid chromatography-tandem mass spectrometry in multiple reactions monitoring mode

“…Due to the ionic nature of the analytes, some alternative methods, such as capillary electrophoresis (CE), 13 ion chromatography (IC), [14][15][16] high performance liquid chromatography with ultra violet detection (HPLC-UV), [17][18][19] and high performance liquid chromatography electrospray ionization mass spectrometry (HPLC-ESI-MS) have been investigated. [20][21][22][23] The CE methods offer a short analysis time, but require solid phase extraction (SPE) of samples and have only achieved low recovery (50-80%).…”

“…25,26 If sample derivatization and extraction are used, the HPLC-UV method can detect MCAA and DCAA down to concentrations of 1-3 mg L À1 . 17 In comparison, HPLC-MS provides better detection specificity and lower detection limits. Note that the conventional liquid chromatographic reversed phase C 18 column does not retain small charged polar molecules well 27 and separation of HAAs needs the assistance of ion-pairing chemicals.…”

Desenvolvimento e validação de metodologia para a determinação de monocloroacetato de sódio e dicloroacetato de sódio em cocoamido,N-[(3-dimetilamino)propil],betaína via cromatografia a gás: GC/FID, GC/ECD e GC/MS

“… Cromatografia de íons com detecção condutimétrica ou por ultravioleta, Nair et al (1994);  Cromatografia líquida de alta eficiência empregando a detecção por fotodiôdo após derivatização com 1-naftilamina, Ghassempour et al (2006);  Cromatografia líquida de alta eficiência utilizando a detecção por ultravioleta, Soleimani et al (2013);  Eletroforese capilar, Martinez et al (1998).…”