A Reduced scale spectrofluorometric method for determination of total petroleum hydrocarbon in seawater
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Abstract
The Intergovernmental Oceanographic Commission (IOC) standard guide for determination of total petroleum hydrocarbon (TPH) in seawater was modified to conform to green analytical chemistry by reducing the volume of samples and extracted solvent. As a result, the pre-concentration factor was reduced from 800 to 20, which suitable to the normal high sensitivity spectrofluorometer currently available in the market. A calibration curve of chrysene without extraction was linear over a concentration range of 10-200 mg×L-1. The regression equation was y=1.567x+2.524 with the coefficient of determination (R2) 0.9992. Limit of detection (3sd/m, n=10) and limit of quantitation (10sd/m, n=10) were 0.065 and 0.22 mg×L-1, respectively. The proposed method was applied to determine TPH in seawater along Bangsean beach in Chonburi province, Thailand. A Collaborative Trials of this proposed method should be performed in order to accept it as a standard method.
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