@article {3092,
	title = {SPECIATION OF ARSENIC COMPOUNDS BY HPLC WITH HYDRIDE GENERATION ATOMIC-ABSORPTION SPECTROMETRY AND INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY DETECTION},
	journal = {Talanta},
	volume = {41},
	number = {4},
	year = {1994},
	note = {ISI Document Delivery No.: NJ813Times Cited: 94Cited Reference Count: 45},
	month = {Apr},
	pages = {495-502},
	type = {Article},
	abstract = {An arsenic specific detection system utilizing on-line microwave digestion and hydride generation atomic absorption spectrometry (MD/HGAAS) is described for arsenic speciation by using high performance liquid chromatography (HPLC). Both ion exchange chromatography and ion pair chromatography have been studied for the separation of arsenite, arsenate, monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), and arsenobetaine (AB). When the commonly used mobile phases, phosphate and carbonate buffers at pH 7.5, are used on an anion exchange column, arsenite and AB co-elute. However, selective determination of these two arsenic compounds can be achieved by using the new detection system. Partial separation between arsenite and AB can be achieved by increasing the mobile phase pH to 10.3 and by using a polymer based anion exchange column. The detection limit obtained by using anion exchange chromatography with MD/HGAAS detection is approximately 10 ng/ml (or 200 pg for a 20-mul sample injection) for arsenite, DMAA and AB, 15 ng/ml (or 300 pg) for MMAA, and 20 ng/ml (or 400 pg) for arsenate. Complete separation of the five arsenic compounds is achieved on a reversed phase C18 column by using sodium heptanesulfonate as ion pair reagent. Comparable resolution between chromatographic peaks is obtained by using MD/HGAAS detection and inductively coupled plasma mass spectrometry (ICPMS) detection.},
	keywords = {ELEMENT-SPECIFIC DETECTOR, IDENTIFICATION, ION CHROMATOGRAPHY, MUSCLE, ORGANOARSENIC COMPOUNDS, PERFORMANCE LIQUID-CHROMATOGRAPHY, QUANTITATION, REFERENCE MATERIAL, SEPARATION, TRACE-ELEMENTS, WATER},
	isbn = {0039-9140},
	url = {<Go to ISI>://A1994NJ81300003},
	author = {Le, X. C. and Cullen, W. R. and Reimer, K. J.}
}
@article {3091,
	title = {SPECIATION OF ARSENIC COMPOUNDS IN SOME MARINE ORGANISMS},
	journal = {Environmental Science \& Technology},
	volume = {28},
	number = {9},
	year = {1994},
	note = {ISI Document Delivery No.: PE258Times Cited: 43Cited Reference Count: 49},
	month = {Sep},
	pages = {1598-1604},
	type = {Article},
	abstract = {Speciation of arsenic compounds in some marine algae, bivalves, and crustaceans was studied by using two techniques: (i) high-performance liquid chromatography with inductively coupled plasma mass spectrometry detection and (ii) hydride generation atomic absorption spectrometry following microwave-assisted digestion. Arsenosugars were identified as the major arsenic compounds present in marine algae, whereas arsenobetaine was the dominant arsenic species present in crab and shrimp. In contrast to most previous reports, which claimed arsenobetaine as the only major arsenic species present in marine bivalves, this study revealed the presence of arsenosugars in addition to arsenobetaine in the bivalves. The speciation of arsenic in sample extracts and {\textquoteright}{\textquoteright}defrost liquid{\textquoteright}{\textquoteright} from previously frozen marine animal samples revealed that up to 48\% of the total arsenic in the sample can be released in the defrost liquid. Arsenic species found in the defrost liquid were identical with those in the sample extracts. Changes in arsenic speciation were observed in the sample extracts that were stored for a long term. Arsenobetaine in sample extracts that were stored at 4 degrees C for 9 months was decomposed to trimethylarsine oxide and two other unidentified arsenic species.},
	keywords = {ARSENIC COMPOUNDS, arsenobetaine, ATOMIC-ABSORPTION SPECTROMETRY, BOMBARDMENT MASS-SPECTROMETRY, ECKLONIA-RADIATA, HOMARUS-AMERICANUS, IDENTIFICATION, KELP, ORGANOARSENIC COMPOUNDS, TRACE-ELEMENTS, TRIMETHYLARSINE OXIDE},
	isbn = {0013-936X},
	url = {<Go to ISI>://A1994PE25800015},
	author = {Le, S. X. C. and Cullen, W. R. and Reimer, K. J.}
}
@article {7295,
	title = {DECOMPOSITION OF ORGANOARSENIC COMPOUNDS BY USING A MICROWAVE-OVEN AND SUBSEQUENT DETERMINATION BY FLOW-INJECTION HYDRIDE GENERATION ATOMIC-ABSORPTION SPECTROMETRY},
	journal = {Applied Organometallic Chemistry},
	volume = {6},
	number = {2},
	year = {1992},
	note = {ISI Document Delivery No.: HQ168Times Cited: 61Cited Reference Count: 33INTERNATIONAL CONF ON ENVIRONMENTAL AND BIOLOGICAL ASPECTS OF MAIN-GROUP ORGANOMETALS ( ICEBAMO )SEP 15-19, 1991PADUA, ITALYUNIV PADUA, ITALIAN CHEM SOC},
	month = {Apr},
	pages = {161-171},
	type = {Proceedings Paper},
	abstract = {Environmentally important organoarsenicals such as arsenobetaine, arsenocholine and tetramethylarsonium ion do not form volatile hydrides under the commonly used analytical conditions on treatment with borohydride and it has been difficult to determine their concentrations without further derivatization. This paper describes a rapid method which completely decomposes and oxidizes these arsenicals to arsenate by using potassium persulphate and sodium hydroxide with the aid of microwave energy. The quantitative decomposition of these species permits their determination at low nanogram levels, by hydride generation atomic absorption spectrometry (HG AA). A new hydride generator which has high efficiency and minimum dead volume and therefore is suitable for flow injection analysis (FIA) is also described. A system combining flow injection analysis, on-line microwave oven digestion, and hydride generation followed by atomic absorption measurement, is developed. This system is capable of performing analysis at a sample throughput of 100-120 per hour. Calibration curves were linear from 10 to 200 ng cm-3 of arsenic and the detection limit was 5 ng cm-3 for a 100-mu-l injection or 0.5 ng of arsenic. All ten organoarsenic compounds studied gave arsenate as the decomposition product, which was confirmed by using molybdenum blue photometric measurement.},
	keywords = {ABSORPTION SPECTROMETRY, arsenic, arsenobetaine, atomic, DECOMPOSITION, DETERMINATION, DISSOLUTION, ENVIRONMENT, FLOW INJECTION ANALYSIS, HYDRIDE GENERATION, IDENTIFICATION, LIQUID-CHROMATOGRAPHY, MICROWAVE OVEN DIGESTION, MUSCLE REFERENCE MATERIAL, QUANTITATION, TRACE-ELEMENTS, WATER},
	isbn = {0268-2605},
	url = {<Go to ISI>://A1992HQ16800008},
	author = {Le, X. C. and Cullen, W. R. and Reimer, K. J.}
}
