鍶在環境中的濃度極低，美國疾病管制局將其列為一種毒化物，因鍶的化性與
鈣相似，要直接量測環境中的鍶不易，因此開發一靈敏且具選擇性的量測鍶方法，
對環境保護及人體危害是非常重要的。漩渦輔助式液液微萃取(vortex-assisted liquid–
liquid microextraction, VALLME) 是一種快速且具選擇性的前處理技術。在萃取過程
中，使用不同碳長鏈的直鏈醇進行溶劑的研究，其結果顯示碳鏈較短的醇類有較好
的萃取效果。雖然正丁醇及正己醇擁有較好的萃取效果，但因溶劑與水具互溶性，
進行萃取時需耗費較大體積的有機溶劑。鑒於水溶性與萃取效果，選擇辛醇作為此
系統的萃取溶劑。真實樣品量測的最佳化條件如下：在50 mL 的樣品中添加輔助離
子3 mM 四苯硼酸納(sodium tetraphenylborate, NaTPB)後加入400 μL 含有5 mM 冠
狀醚(4',4''(5'')-di-(tert-butylcyclohexano)-18-crown-6, DtBuCH18C6)的辛醇作為萃取溶
劑，在手搖10 秒、vortex 1 分鐘後，以3200 rcf 離心5 分鐘。最後使用0.1M HNO3
進行反萃取步驟，稀釋到合適的pH 值再注入到離子層析儀(ion chromatography, IC)
分析。在最佳化條件下，偵測極限(detection limit)可達0.67 μg L-1。此方法已應用在
量測奶茶、牙膏、海帶及昆布中的鍶離子。

The strontium has low concentration in the environment, listed by U.S Centers for
Disease Control and Prevention (CDC) as a poison. Because chemical property of
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health protection and environmental safety. Vortex-assisted liquid–liquid microextraction
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as extraction solvents to study the effect of carbon chain length of alcohols in the system.
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chain length. Although 1-butanol and1-hexanol exhibit better extraction efficiency,
additional amount of solvent is required in order to have sufficient extraction volume for
collection. Due to solvent miscibility, solubility and extraction efficiency, 1-octanol was
used as extraction solvent in which dissolved 4',4''(5'')-di-(tert-butylcyclohexano)-18-
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chromatography. The optimum microextraction conditions were as follows: 50 mL
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phase with 5 mM DtBuCH18C6; vortex extraction time for 60 sec; centrifugation at 3200
relative centrifugal force (rcf) for 5 min. Under optimum conditions, the detection limit
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