@article {877,
	title = {Arsenic uptake by the Douglas-fir (Pseudotsuga menziesie)},
	journal = {Applied Organometallic Chemistry},
	volume = {18},
	number = {12},
	year = {2004},
	note = {ISI Document Delivery No.: 880PLTimes Cited: 2Cited Reference Count: 26International Conference on Environmental and Biological Aspects of Main Group OrganometallicsDEC 03-05, 2003Pau, FRANCE},
	month = {Dec},
	pages = {626-630},
	type = {Proceedings Paper},
	abstract = {The Douglas fir (Pseudotsuga menziesie) growing in an arsenic-rich gold-bearing region contains elevated arsenic concentrations in new-growth stems (374ppm dry weight (dw)) and needles (257ppm dw). Speciation of methanol-water extracts by using high-performance liquid chromatography- inductively coupled plasma mass spectrometry show that arsenite is the major species in needles but arsenate is more dominant in stems. Only traces of methylarsenicals are present. Arsenic concentrations in other tree species growing in the region are generally much lower; dimethylarsinate was extracted from a spruce cone. Copyright (C) 2004 John Wiley Sons, Ltd.},
	keywords = {accumulation, arsenic, CANADA, CONTAMINATED SOILS, Douglas fir, ENVIRONMENT, fern, gold mine, HPLC-ICP-MS, HYPERACCUMULATOR, PHYTOCHELATINS, PLANTS, SPECIATION},
	isbn = {0268-2605},
	url = {<Go to ISI>://000225801600005},
	author = {Haug, C. M. and Reimer, K. J. and Cullen, W. R.}
}
@article {738,
	title = {Direct determination of polycyclic aromatic hydrocarbons in solid matrices using laser desorption/laser photoionization ion trap mass spectrometry},
	journal = {Journal of the American Society for Mass Spectrometry},
	volume = {14},
	number = {6},
	year = {2003},
	note = {ISI Document Delivery No.: 684BJTimes Cited: 8Cited Reference Count: 48},
	month = {Jun},
	pages = {562-570},
	type = {Article},
	abstract = {The development and characterization of a new instrument for solid sampling which couples IR laser desorption followed by UV laser photo-ionization and analysis using an ion trap mass spectrometer has been investigated. For calibration, a new type of solid sample preparation involving activated charcoal as the solid substrate was used. This solid sample provided a steady signal for several thousand laser shots, which allowed optimization of the experimental procedure. It was found that both the IR and UV intensity and the delay between them play an important role in both the magnitude and type of signals observed. A method of gas phase accumulation with multiple laser shots was examined. Finally, this technique was demonstrated to be effective in providing direct qualitative information. for N.I.S.T. SRM 1944 river sediment sample with no sample pre-treatment. (J Am Soc Mass Spectrom 2003,14,562-570) (C) 2003 American Society for Mass Spectrometry.},
	keywords = {CONTAMINATED SOILS, ENVIRONMENT, FLUORESCENCE, GAS-CHROMATOGRAPHY, IONIZATION DETECTION, MULTIPHOTON IONIZATION, ORGANIC-SURFACE ANALYSIS, SIMULATION, SPECTROSCOPY, THERMAL-DESORPTION},
	isbn = {1044-0305},
	url = {<Go to ISI>://000183185300002},
	author = {Specht, A. A. and Blades, M. W.}
}
@article {420,
	title = {Sample extraction for arsenic speciation},
	journal = {Canadian Journal of Analytical Sciences and Spectroscopy},
	volume = {47},
	number = {4},
	year = {2002},
	note = {ISI Document Delivery No.: 641DMTimes Cited: 15Cited Reference Count: 47Joint Meetings of EnviroAnalysis 2002/48th International Conference on Analytical Sciences and SpectroscopyMAY 27-30, 2002TORONTO, CANADA},
	pages = {109-118},
	type = {Proceedings Paper},
	abstract = {The standard method used to determine arsenic species in solid samples is by using an extraction method that minimizes any operationally induced changes in chemical form. However, the use of such methods often results in less than complete extraction, with extraction efficiencies ranging from <1\% to 100\% for many types of samples. In this study the effect on extraction efficiency of the variables of total arsenic content, sample type and extraction method (methanol/water vs. simulated gastric conditions) were examined. The arsenic content in plant and deer mouse samples from Yellowknife, NT, as well as commercially available hijiki, an edible alga, and their extracts, was determined. Statistical analysis of the results revealed that extraction efficiencies are lower for both plants and mouse tissues that contain the highest levels of arsenic, and this trend persists in plants even when more exhaustive extraction methods (Le., Soxhlet extraction) are used. When the plant data was examined with respect to taxonomic groupings moss appeared to be extracted less efficiently than most other plants, and sedge and cattail appeared to be extracted most efficiently. An extraction method modeling human gastrointestinal conditions, gastric fluid extraction (GFE), was comparable to methanol/water extraction of plants with respect to amounts extracted and proportions of As(III) and As(V) present. However, methanol/water was used more efficiently to extract arsenic from wet hijiki than the GFE method. It is important to include information about extraction efficiency when discussing speciation of arsenic in a sample.},
	keywords = {ACCELERATED SOLVENT-EXTRACTION, arsenobetaine, BIOAVAILABILITY, CANADA, CERTIFIED-REFERENCE-MATERIALS, CONTAMINATED SOILS, ORGANISMS, PERFORMANCE LIQUID-CHROMATOGRAPHY, PLANTS, PLASMA-MASS SPECTROMETRY, TERRESTRIAL},
	isbn = {1205-6685},
	url = {<Go to ISI>://000180729200004},
	author = {Koch, I. and Hough, C. and Mousseau, S. and Mir, K. and Rutter, A. and Ollson, C. and Lee, E. and Andrewes, P. and Granhchino, S. and Cullen, B. and Reimer, K.}
}
