| http://www.w3.org/ns/prov#value | - Although changes in the desorption laser parameters and the delay time cause the largest effects, the ionization laser power and alignment are the most difficult parameters to control and thus provide the most practical limitations for quantitative microL(2)MS. Variation in ratios is seen in both synthetic poly(vinyl chloride) membranes and in real-life samples of Murchison meteorite powder.
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