Determination and SizeFractional Distribution of the Elements in Garlic.pdf

ANALYTICAL SCIENCES JANUARY 2009, VOL. 25 113377 2009 © The Japan Society for Analytical Chemistry Notes Determination and Size-Fractional Distribution of the Elements in Garlic Yanbei ZHU,*† Kazumi INAGAKI,* Hiroki HARAGUCHI,** and Koichi CHIBA* *Environmental Standard Section, Inorganic Analytical Chemistry Division, National Metrology Institute of Jap an (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305–8563, Jap an **Dep artment of App lied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464–8603, Jap an Thirty elements in garlic sample were determined by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) after microwave digestion. The concentrations of K, Ca,Na, Sr, and Hg in the present garlic sample were higher than those in rice and wheat, but the concentration of Se in the garlic sample was relatively lower. The extractability of the elements in the garlic sample was also examined; the results showed that most of the elements could be easily extracted by pure water and/or a 0.1 M HNO3 solution, except for Hg. Furthermore, the size-fractional distribution of the elements in garlic was investigated by pure water extraction and centrifugal ultrafiltration. (Received October 24, 2008; Accepted October 31, 2008; Published January 10, 2009) (ICP-AES) and inductively coupled plasma