GRO Mix ，分析标准品,，均以2000 μg/mL 溶于甲醇

组分如下：                                                                                                                                              Benzene
Ethylbenzene
3-Methylpentane
Naphthalene
Toluene
1,2,4-Trimethylbenzene
2,2,4-Trimethylpentane
o-Xylene
m-Xylene