%0 Journal Article %J Analytical Chemistry %D 2003 %T Mass spectrometric analysis of DNA mixtures: Instrumental effects responsible for decreased sensitivity with increasing mass %A Chen, X. Y. %A Westphall, M. S. %A L. M. Smith %B Analytical Chemistry %V 75 %P 5944-5952 %8 Nov 1 %G eng %R 10.1021/ac030127h %F ISI 2003 week 48