【摘要】 基质辅助激光解吸/电离飞行时间质谱(MALDI-TOF MS)作为一种软电离质谱技术，因其灵敏度高、快速、准确的特点，得到广泛的应用。研究了基质、制样方法、基质与样品的比例，以及激光强度对聚(3-辛基噻吩)(P3OT)分子量测定的影响。结果表明，选用反-2-[3-(4-叔丁基苯基)-2-甲基-2-亚丙烯基]丙二腈(DCTB)为基质，以质量比为1:20的样品/基质比例，采用干点法制样，在激光强度为60%时，可以得到P3OT的最佳图谱，数据分析重复单元分子量与P3OT重复单元一致。更多还原

【Abstract】 As a soft ionization mass spectrometry,matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) has been widely used due to the characteristics of high sensitivity,speed and accuracy.By studying the effects of matrix,sample preparation method,matrix to sample ratio,and laser intensity on the molecular weight determination of poly(3-octylthiophene) (P3OT),the results showed that the optimal map of P3OT can be obtained when the laser intensity is 60% by using trans-2-[3-(4-tert-Butylphenyl)-2-methyl-2-propenylidene]malononitrile (DCTB) as matrix,the sample/matrix ratio of 1:20 and dry point method.The molecular weight of repeat unit is consistent with that of P3OT repeat unit.更多还原