Studies of the analytical method for suntan agents in sea water

• Main Authors: Peng-En Yu, 余朋恩
• Other Authors: Wei-Hsien Wang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/69927591482500259881

碩士 === 國立中山大學 === 海洋生物科技暨資源學系研究所 === 102 === A quick and reliable analytical method for the determination of suntan agents in sea water was developed. Liquid-liquid phase extraction was used for sample pretreatment. To 450 mL of sea water sample, 1 mL of extraction solvent mixture composed of 1-octanol and iso-octane (2:8, v/v) was added. The sample was shaken for five minutes and then stood for thirty minutes. The organic layer was transfered into a sample vial. Five suntan agents including Benzophenone (BP), 2,4-Dihydroxy- benzophenone (BP-1), Oxybenzone (BP-3), 2,2''-Dihydroxy-4-methoxybenzophe- none (BP-8) and 4-Methylbenzylidene camphor (4-MBC) were analyzed by LC-MS/MS equipped with a mobile phase composed of deionized water and methanol. The recovery rates were 53.3-115.0 %, limit of detection were 1.0-1.7 ng/L and limit of quantitative were 3.2-5.7 ng/L. In October 3rd and 12th 2013, environmental water samples were collected from five sampling sites along the coast of Hengchun peninsula to investigate the contents of suntan agents. Contents of BP, BP-3, 4-MBC, BP-1 and BP-8 were 1.2-6.7 ng/L, 5.2-156.2 ng/L, N.D.-2.1 ng/L, N.D. and N.D., respectively. The total concentration of suntan agents ranged between 9.9 and 160.3 ng/L.