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Table of Contents < Method 549.1 Method 551.1 >  Method 550/550.1 The USEPA Method 550 and 550.1 are analytical methods in which a sample is extracted utilizing liquid-liquid extraction, concentrated, then analyzed using an HPLC system to perform the separation and UV and fluorescence detectors to detect the analytes.  COMBINATION BLEND Compound µg/mL Acenaphthene 1000 Acenaphthylene 1000 Anthracene 50 Benz(a)anthracene 1 Benzo(a)pyrene 5 Benzo(b)fluoranthene 1 Benzo(g,h,i)perylene 5 Benzo(k)fluoranthene 1 Compound µg/mL Chrysene 50 Dibenz(a,h)anthracene 10 Fluoranthene 5 Fluorene 100 Indeno(1,2,3-c,d)pyrene 10 Naphthalene 1000 Phenanthrene 50 Pyrene 50         10 mL @ 1 µg/ml in ACN   Catalog#: 550-A           10 mL @ 5 µg/ml in ACN   Catalog#: 550-A           10 mL @ 10 µg/ml in ACN   Catalog#: 550-A           10 mL @ 50 µg/ml in ACN   Catalog#: 550-A           10 mL @ 100 µg/ml in ACN   Catalog#: 550-A           10 mL @ 1000 µg/ml in ACN   Catalog#: 550-A       INT STD 4,4'-Dichlorobiphenyl         1.2 mL @ 100 µg/ml in ACN   Catalog#: 550-I