46 植物ホルモンの分析のためのLC-MS-SIMの高感度の設定条件

概要

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For a higher sensitivity, the parameters of liquid chromatography-mass spectrometry-selected ion monitoring (LC-MS-SIM) usirtg atmospheric pressure chemical ionization (APCI) were examined. The area and height of a peak as sensitivity, the full width half maximum (FWHM) and the actual scan-time which was required for the scanning were measured. The suitable parameters for higher sensitivity on measurement limit level were as follows: 1) The scan-tlme might correspond to the value of FWHM. 2) The countling-number was over about 7,000. 3) The scan-range might correspond to a decimal fraction of the molecular weight of the sample substance. The results showed that the value obtained from repeated sampling-point-number was a total amount, that the value obtained from repeated counting-number was a mean.
2001-10-09