PRELIMINARY REPORT ON THE CONTAMINATION CONTROL FOR CHEMICAL ANALYSES OF ANTARCTIC ICE SAMPLES

元データ 国立極地研究所

概要

A possible penetration of contamination from the surface toward the inner part of cored ice and firn block samples was investigated for proper chemical analysis of Cl, SO_4,NO_3,NH_4,Na, K, Mg, Al, Fe, Ni, Cu, Zn and other elements. Generally, the contamination of the ice core sample remains within 10mm under the surface. However, for the elements with intense contamination, a high concentration level in the surface layer tends to affect the level in the inner part. For the firn block sample, though the contamination by Cl, SO_4,and NO_3 remains within 20mm of depth from the surface, NH_4,Na, K, Cu and Zn seem to pass through the surface layer but remain within 40mm. A thermal knife was constructed, for use in the laboratory, of nichrome wire of 1mm diameter covered with a platinum pipe, tested for cutting cored ice samples and was found satisfactory without significant contamination of the elements listed above. The use of a stainless steel hand saw was also found practical for firn block samples.

著者

Watanabe Okitsugu National Institute of Polar Research, Research Organization of Information and Systems
Watanabe Okitsugu National Institute Of Polar Research
Nishio F Hokkaido University Of Education Kushiro Branch
Nishio Fumihiko National Institute Of Polar Research
Kanamori Satoru Water Research Institute, Nagoya University
Kanamori Nobuko Water Research Institute, Nagoya University
Nishikawa Masataka National Institute for Environmental Studies
Kanamori Nobuko Atmospheric And Hydrospheric Research Institute Nagoya University
Kanamori Satoru Water Research Institute Nagoya University
Kanamori Nobuko National Institute Of Polar Research
Osada Kazuo Meteorological Research Institute
Osada Kazuo Water Research Institute, Nagoya University
Isa Eriko Water Research Institute, Nagoya University
Isa Eriko Water Research Institute Nagoya University
Kanamori Satoru National Institute of Polar Research
Nishio Fumihiko Hokkaido University Of Education Kushiro Branch
Osada K Graduate School Of Environmental Studies Nagoya University
Osada Kazuo Water Research Institute Nagoya University
Nishikawa Masataka National Institute For Environment Studies
Kanamori Nobuko Water Research Institute Nagoya Univerisity

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