4、色剂吸收液0251000.3930.3810.3100.16620.3630.3480.3250.27550.3440.3340.3250.232100.3240.3190.2560.174试剂空白的吸光度(5mL吸收液+0.4mL硫酸铁铵):显色剂吸收液0251000.0330.0140.0130.01420.0130.0210.0120.02050.0160.0160.0130.011100.0100.0100.0100.008再根据标准曲线 Y =0.3876x+0.006回归系数: r = 0.9999