Speaker:
Ms. Kathy Ackley
University of Cincinnati
Cincinnati, OH
Date:
Thursday, August 20, 1998 10:30 am
Ben Bandy Conference Center
Center for Applied Energy Research
Abstract:
Proper sample preparation of biological materials is critical for trace
elemental analysis by inductively coupled plasma-mass spectrometry
(ICP-MS). Preparation of these materials is more challenging when
speciation is performed since extraction/digestion methods must preserve
species integrity. Arsenic species of interest (arsenobetaine,
arsenocholine, dimethylarsinic acid, monomethylarsonic acid and inorganic
arsenic) are typically extracted from fish samples by conventional solvent
extraction methods. However, these techniques are time consuming and
create a possible source of sample contamination. Microwave assisted
extraction (MAE) dramatically reduces sample preparation times and the
amount of solvent required. Extracted species can be separated using
chromatography and quantified using ICP-MS.