ชนิดและปริมาณปิโตรเลียมไฮโดรคาร์บอนที่ละลายอยู่ในแม่น้ำเจ้าพระยา แม่น้ำบางปะกง แม่น้ำท่าจีน และอ่าวไทยตอนบน / วัชรี ชาตกิตติคุณวงศ์ = Dissolved petroleum hydrocarbon in the Chao Phraya River, Bang Prakong River, Tha-Chin River and the Upper Gulf of Thailand / Watcharee Chartkittikunwong
The analysis of dissolved petroleum hydrocarbons in the Chao Phraya river. Bang Prakong river, Tha-Chin river and the Upper Gulf of Thailand during rainy season (September-December) and summer season ( March-April) in 1983-1984 was performed by using Gas Chromatography, Gas Chromatography/Mass Spectrometry (GC,GC/MS) and Spectroflucrometric techniques. For each season the water samples of Cho Phraya river were collected from twenty station, while that of Bang Prakong and Tha-Chin river were from twelve stations and twenty-five stations from the Upper Gulf of Thailand. From the results of GC and GC/MS, it was possible to conclude that the compounds presence in the samples of Chao Phraya river, Bang Prakong river, Tha-Chin river and Upper Gulf of Thailand were mainly straight chain aliphatic hydrocarbons of C15-C32. By using spectrofluorometric techniques; the concentrations of petroleum hydrocarbon in the Chao Phraya river, Bang Prakong river, Tha-Chin river and the Upper Gulf of Thailand in rainy season were found to be between 0.190-0.431, 0.056-0.406, 0.260-0.550 and 0.172-0.886 ug/L respectively. While in summer season the concentrations changed to be 0.514-0.799 ug/L for Chao Phraya river; 0.318-0.678ug/L for Bang Prakong river and 0.337-0.435 g/L for Tha-Chin river. Comparison of the concentration found between the rivers and Upper Gulf of Thailand during rainy season showed no statistically significant difference but during summer season the differences were well pronounced. The concentration of petroleum hydrocarbons found in the same rivers of different season showed statistically significant difference. The amount found from Chao Phraya river and Bang Prakon river showed significant difference at the level of .01 while that of Tha-Chin river was at the level 0f .05. studies of dissolved petroleum hydrocarbons in the water sample were investigated using Gravimetric Method, Partition Infrared Method and Spectrofluorometric Method. It was concluded that each technique was appropriate for each particular compound sought for. From the experiment performed, n-hexane was found to be superior solvent compared to carbon tetrachloride for extraction recommended in Spectrofluorometric Method.