Estimation of Oxalic Acid in Drinks

URI http://cur-ren.cjc.ac.jp/metadata/725
FulltextURL
Title
Estimation of Oxalic Acid in Drinks
Author
著者 Shimada Yoshihiro
著者(別表記) 嶋田 義弘
Abstract

The levels of oxalic acid in commercially obtainable drinks were estimated using ion chromatography. Variability of oxalic acid contents in many drinks was observed. Large amounts of oxalic acid were contained in Maccha. That amount was about 6 times that in green tea. The difference of oxalic acid contents in tea by infusion time was examined. The maximum concentration of oxalic acid in distilled water was reached in 4 minutes. Oxalic acid concentration by water used for infusion, distilled water and tap water, were compared. The difference in the two results can be regarded as significant. There was a significant difference in the oxalic acid concentration in distilled water and in tap water (p<0.05).

Subject
490 Medical sciences. Pharmaceutics
Keyword
oxalic acid
ion chromatography
distilled water
tap water
green tea
black tea
References

1. Wandzilak TR, D Andre SD, Davis PA, Williams HE: Effect of high dose C on urinary oxalate levels. J Urol (1994) 151, 834-837.
2. Robertson WG, Hughes H: Importance of mild hyperoxaluria in the pathogenesis of urolithiasis. Scanning Microsc (1993) 7, 391-402.
3. Williams HE, Smith LH: Primary hyperoxaluria; in The Metabolic Basis of Inherited Disease, Mcgraw-Hill, New York, USA (1983) pp.201-208.
4. Hodgkinson A: Evidence of increased oxalate absorption in patients with calcium-containing renal stones. Clin Sci Mol Med (1978) 54, 291-294.
5. Weaver CM, Martin BR, Ebner JS, Krueger CA : Oxalic acid decreases calcium absorption in rats. J Nutr (1987) 117, 1903-1906.
6. Liebman M, Doane L : Calcium and zinc balances during consumption of high and low oxalate-containing vegetables. Nutr Res (1989) 9, 947-955.
7. Kawazu Y, Okimura M, Ishii T,Yui S : Varietal and seasonal differences in oxalate content of Spinach. Sci Horticulture (2003) 97, 203-210.

Publish Date
2012
Publication Title
Chugokugakuen journal
Volume
11
Start Page
13
End Page
16
ISSN
1348-1452
NCID
AA11806612
Publisher
Chugokugakuen University/Chugoku Junior College
Copyright Holders
中国学園大学
中国短期大学
Contents Type
Departmental Bulletin Paper
language
English
File Version
publisher