标准�? Herbicide Acids Matrix Spike,Varied conc. in MeOH

有机氯除草剂混标方法615/10 组分, Underivatized Chlorinated Herbicides,Varied conc. in MeOH

EPA方法8150A-8种混�? Method 8150 Mix-Methyl Der.,20.0 μg/mL in Hexane

9种内标及替代物混�?0.2mg/mL, Internal/Surrogate Standard VOA Mix,0.2 mg/mL in MeOH

方法8240 挥发性有机物GC/MS标准�? Method 8240-GC/MS for Volatile Org.,0.2 mg/mL in MeOH

内标混合物@ 0.2 mg / mL的甲醇溶�? Internal Standard Mix,0.2 mg/mL in MeOH

VOC10种混�? Additional VOC's by Method 8260B,2000 μg/mL in MeOH

EPA方法8260内标, Internal Standard Mix,0.2 mg/mL in MeOH

EPA方法8270-17种混�? Semi-Volatile by Capillary Column GC/MS Mix 1,2.0 mg/mL in CH2Cl2

EPA方法8270-6种混�? Method 8270 Semi-Volatile Mix 4B-R1,2.0 mg/mL in CH2Cl2