Simultaneous determination of bromide and iodide as acetone derivatives by gas chromatography and electron capture detection in natural waters and biological fluids

Abstract

Oxidation of bromide and iodide ions in acidic solutions in the presence of acetone forms the corresponding acetone derivatives. Iodate was reduced with thiosulfate prior to the determination. After extraction with benzene the bromo- and iodoacetone were measured by gas chromatography using electron capture detection. The bromide and iodide contents of rainwater, drinking water, river water, seawater, oil brine, common salt, cow milk, and human blood serum were determined. The relative standard deviations for bromide at 10(-7) M and for iodide at 10(-8) M concentration were 1.9% and 3.0%, respectively, using a 10-mL sample for the determination without preconcentration.

A Review of Spectrophotometric and Chromatographic Methods and Sample Preparation Procedures for Determination of Iodine in Miscellaneous Matrices

“…For any given purpose, one of the first factors taken into account is whether the method's detection limit is adequately low. Several methods of iodine determination have been proposed, including catalytic methods (with LOD=0.1 μg/ l) (Kamavisdar & Patel, 2002), chromatography in various modes (eg., IC with LOD = 0.1-0.8 μg/l (Hu et al, 1999;Bichsel & Von-Gunten, 1999), (chromatographic methods are especially useful for iodine speciation when coupled with ICP-MS or elecrochemical detection), GC-EC: gas chromatography with electron capture detection (0.11μg/l) (Maros et al, 1989), GC-MS: gas chromatography-mass spectrometry(0.010 μg/l) (Das et al, 2004), FAAS: flame atomic absorption spectrometry (2.75 μg/l) (Yebra & Bollaín, 2010), NAA (0.1-0.2 μg/l) (Hou et al, 1999), ETAAS: electrothermal atomic absorption spectrometry (1.2 -3.7 μg/l) (Bermejo-Barrera et al, 1999), inductively coupled plasma mass spectrometry ICP-MS (1.0-9.0 μg/l) (Fernandez-Sanchez & Szpunar 1999), ICP-AES (40.0-470.0 μg/l) (Anderson & Markowski, 2000), inductively coupled plasma optical emission spectrometry (ICP-OES) (2 µg/l) (Naozuka et al, 2003), ion selective electrodes (1.96 μg/l) (Kandhro et al, 2009), X-rayfluorescence (XRF) (180 μg/L) (Varga, 2007), VG-ICP-OES: vapour generation inductively coupled plasma optical emission spektrometry (20 μg/l) (Niedobová at al., 2005). The iodine content can also be measured by the use of titrimetric methods usually combined with potentiometric measurements.…”

The determination of iodine species in environmental and biological samples (Technical Report)

“…( d ) Gas chromatographic Gas chromatographic estimation of inorganic halides, including iodide, after derivatization by alkylation [126]; by phase transfer catalysis [127]; as HI [128]; and as pentafluorobenzyl iodide [129]. Electron capture appeared to be the detection method of choice [e.g.…”

“…Probably the GC method that has been applied to the greatest range of samples involved the conversion of iodide (and bromide) to acetone derivatives and their subsequent detection by electron capture [129]. The technique was used for measuring iodide in rainwater, drinking water, river water, seawater, oil brine, common salt, cow's milk, and human blood serum.…”

“…Some studies involved the determination of iodine species in water and other matrices; for example Salov et al [ 1421 used HPLC ICP-MS to examine soup and human urine in addition to water, and Maros et al [129] employed GC to analyse salt, cow's milk and blood serum as well as a water samples of different origins. Both studies are mentioned in the previous section.…”

Спектрометрический Метод Определения Несвязанного Йода В Йодированных Эфирах Жирных Кислот

“…В настоящее время существует большое число ме-тодов, позволяющих определять присутствие йода в различных веществах [1][2][3][4][5][6][7][8], но все они либо трудоемки, либо требуют сложного оборудования. В настоящей работе для количественного определения содержания свободного йода в йодсодержащих веществах предлага-ется простой и достаточно точный метод, основанный на измерении оптической плотности растворов испытуемых веществ на одной длине волны 360 nm.…”