7 Sample preparation and analysis 7.1 Preparation of SCCP calibration solution (50 μg/ml) with 59 % chlorination degree 533 μl of SCCP C10-C13 55,5 % Cl standard solution (5.4.1) and 467 μl SCCP C10-C13 63 % Cl standard solution (5.4.2) are transferred into a 2 ml volumetric flask (4.5). 20 μl of internal standard solution (5.3) is added and the flask filled up to the volume with n-hexane (5.1). The calibration standard with 59 % chlorine content shall be used for the quantification of all samples, independent of their chlorination degree (if known). 关于标准的这步配制我个人不是很能理解,50mg/L的这是碳的浓度,我是清楚的,但是59%的氯含量我就不能理解了,这个氯含量的不是应该也要减半,是29.5%才是吗? 有了解老师可以讨论下。