@article{oai:nipr.repo.nii.ac.jp:00003531,
 author = {カナモリ, サトル and カナモリ, ノブコ and オサダ, カズオ and イサ, エリコ and ニシカワ, マサタカ and ワタナベ, オキツグ and ニシオ, フミヒコ and KANAMORI, Satoru and KANAMORI, Nobuko and OSADA, Kazuo and ISA, Eriko and NISHIKAWA, Masataka and WATANABE, Okitsugu and NISHIO, Fumihiko},
 journal = {Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology},
 month = {Sep},
 note = {P(論文), 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.},
 pages = {132--139},
 title = {PRELIMINARY REPORT ON THE CONTAMINATION CONTROL FOR CHEMICAL ANALYSES OF ANTARCTIC ICE SAMPLES},
 volume = {1},
 year = {1987}
}