臺灣地區一直持續進行溫泉的相關研究，但由於溫泉水中的稀土元素濃度相當低，且溫泉中含有許多濃度高且複雜的基質元素，因此稀土元素的量測有其難度存在。因此使用有效的純化技術以萃取樣品中的稀土元素，並降低基質干擾，才能得到更精確的分析結果。
本研究選擇臺灣島內15個溫泉水樣，利用RE層析管柱純化溫泉水中的稀土元素（Rare earth elements），並以Sr spec樹脂純化樣品中的鍶，同時配合高解析度感應耦合電漿質譜儀（HR-ICP-MS, Element II）精確測量溫泉水中稀土元素分布、利用多通道式感應耦合電漿質譜儀（MC-ICP-MS, Neptune）測定樣品中的鍶同位素比值。RE層析管柱可移除絕大部分的鹽類基質影響，並可有效萃取水樣中的稀土元素，提高測量精確度。
結果顯示溫泉中的稀土元素含量約在0.5ppt至29.7ppb之間，以大屯火山群溫泉最高，沈積岩區次之，變質岩地區溫泉最低。岩性差異與pH值高低可能是影響稀土元素濃度的因素之一。鍶同位素比值與稀土元素含量也指出了岩性差異與稀土元素高低的不同。而溫泉的稀土元素球粒隕石標準化分布模式主要有輕稀土富集型、重稀土富集型、接近平坦型等幾類。不同岩性的溫泉也可能出現相似的分布模式。
本研究的溫泉依溫泉的稀土元素濃度及分布模式兩個基準，將溫泉區分出五大類型。顯示稀土元素濃度及分布可用來辨識出可能受到相似來源及化學作用的溫泉，最明顯獨特的兩群溫泉為大屯火山泉溫泉及金山、關子嶺溫泉。結果指出除了pH值外，岩性也可能影響稀土元素之濃度與分布，但稀土分布模式並非只受控於岩性因素，或許也可能受到其他特殊的化學作用影響。其中之一可能是水中的稀土元素絡合物種類。

Although there are many previous studies on hot springs in Taiwan, only few studies discussed about the rare earth elements (REEs) of them. As the results of the low concentrations of REEs and the complicated and concentrated matrix in hot springs, the précised measuring of REEs is difficult. Hence, we try to improve the effective purification techniques to extract REEs from the hot spring samples and achieve more accurate analysis results.
In this study, there are 15 hot spring samples collected within Taiwan. REEs were separated from the samples using RE resin and those concentrations were measured by HR-ICP-MS (Element II). Strontium in samples was isolated by using Sr spec resin and the strontium isotopic ratio was determined by MC-ICP-MS (Neptune).
The results showed that the concentrations of REEs in hot springs are between 0.5ppt and 29.7ppt, with the highest concentrations being present in Tatun volcano group, followed by springs from sedimentary rocks and metamorphic rocks. Combined the REEs concentrations and the Sr isotopic ratios data, the results indicated that the local rock types and the pH values could affect REE patterns in hot spring. According to the REEs concentrations and patterns, hot springs are categorized into 5 types. These identify hot springs were affected by different sources or chemical reactions. The most distinct hot spring samples are from Tatun volcano、Jinshan and Guanziling hot springs. Results have shown that lithology could affect the concentration and distribution of REEs. However, the REE patterns are not only affected by lithology, but also other chemical reactions, such as the speciation of the REEs present in spring.

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參考網站
Eichrom Technologies。 http://www.eichrom.com/
中央地質調查所網站。 http://www.moeacgs.gov.tw/main.jsp/