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2784 Letter to the Editor range, which may not be acceptable for quantitative analysis. Compared with PDA detection, a 10-fold decrease in LOQs was obtained by APPI-MS or APCI-MS.APPI-MS was tested for analysis of fullerenes. The preliminary experiment for trace analysis of fullerenes by LC/APPI-MS was examined. The overall performance of APPI-MS was comparable to that of APCI-MS for determination of C 60 and C 70 . The method would be applicable to quan-titative analysis of fullerenes in environmental or biological samples.

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