Underground Storage Tank (UST) Modified GRO ，分析标准品，均以1000 μg/mL 溶于甲醇。

组分如下                                                                                                                                                 Benzene
tert-Butyl methyl ether
Ethylbenzene
Naphthalene
Toluene
1,2,4-Trimethylbenzene
1,3,5-Trimethylbenzene
o-Xylene
m-Xylene
p-Xylene