HJ/T 32-1999
Stationary source eMission. Determination of phenols. 4-Amino-antipyrine spectrophotometric method 固定污染源排气中酚类化合物的测定 4-氨基安替比林分光光度法 |
GB/T 17830-1999
DeterMination of polyethylene glycol in polyethoxy-lated nonionic surfactants by HPLC 聚乙氧基化非离子表面活性剂中聚乙二醇含量的测定 高效液相色谱法 |
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