比較市售瓶裝飲用水之元素特徵

Comparison in Mineral Characteristics among Commercial Bottled Waters

梁文睿(Wen-Jui Liang) ； 彭宗仁(Tsung-Ren Peng) ； 蔡修裕(Shiou-Yuh Tsai) ； 林娉婷(Ping-Ting Lin) ； 黃秉益(Ping-Yi Huang) ； 林毓雯(Yu-Wen Lin) ； 黃群鈞(Chun-Chun Huang) ； 劉滄棽(Tsang-Sen Liu)

《台灣農業研究》 66卷1期 (2017/03) Pp. 74-86

https://doi.org/10.6156/JTAR/2017.06601.09

摘要

本研究之主要目的在分析各類市售瓶裝飲用水、自來水與去離子/ 逆滲透水之大量及微量元素之濃度，進一步透過主成分分析 (principal component analysis; PCA)，以比較各類瓶裝水間元素特徵之異同，同時評估PCA 能否作為市售瓶裝水是否以自來水做為原水的鑑別技術。結果顯示，除有一類海水源瓶裝水之部分元素濃度高於自來水外，其餘瓶裝水之大量及微量元素之濃度均都低於自來水，甚至有些瓶裝水之元素濃度甚低且接近去離子水之值。再者，PCA 分析可區分出瓶裝水之水源是來自陸域淡水或海水。淡水源瓶裝水依PCA 結果可區分為BW-1、BW-2、BW-3 三類。BW-1、BW-3 之PCA 元素濃度特徵分別與自來水及去離子水相同，意指BW-1 及BW-3 的水源可能分別與自來水和去離子水有關。而BW-2 之PCA 元素濃度特徵則介於BW-1 與BW-3 間。PCA 分析亦發現有一類標示為海水源的瓶裝水之元素濃度特徵與去離子水相同，該商品之水源標示應該有誤。

關鍵字

瓶裝水 ； 元素含量 ； 主成分分析

並列摘要

To evaluate the mineral characteristics of commercial bottled drinking waters sold locally, their concentrations of major and trace elements were analyzed and compared with those of tap water, deionized water and reverse-osmosis water using the principal component analysis (PCA). Whether PCA can be applied to separate the difference between bottled drinking water and tap water was also assessed. Results showed that, except one kind of seawater-sourced bottled water, concentrations of major and trace elements of examined bottled waters were lower than those of tap water, and levels of some bottled waters were low enough to compete with those of deionized water. Furthermore, PCA can not only distinguish bottled water sourced from terrestrial fresh water or sea water, but also divide fresh water-sourced bottled waters into three different groups, BW-1, BW-2 and BW-3. The mineral characteristics of BW-1 and BW-3 were similar to those of tap water and deionized water, respectively, implying that water sources of BW-1 and BW-3 are highly related to tap water and deionized water, respectively. The characteristic of BW-2 lies between the BW-1 and the BW-3. The most concerned about this study is that there was one kind of bottled water claimed a sea water source exhibiting the mineral characteristics similar to that of deionized water, indicating goods carrying incorrect designation of origin.

並列關鍵字

Bottled water ； Elemental concentration ； Principal component analysis (PCA)