| Autor: |
Miller, D., Conte, E. D., Perschbacher, P. W., Shen, C. Y. |
| Předmět: |
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| Zdroj: |
Water Science & Technology; 1999, Vol. 40 Issue 6, p165, 0p |
| Abstrakt: |
A colorimetric method to quantify methylisoborneol and geosmin in water and fish flesh based on a spot test by Wood and Snoeyink was developed. To test water samples, one liter of filtered water is pumped through a solid phase extraction device and the off-flavor eluted fromthe device with toluene. The toluene is combined with a 1 percent vanillin in concentrated sulfuric acid and agitated for 30 min to produce the color change. The standard solution is yellow and at increasing concentrations of 2-methylisoborneol or geosmin the color changes from light orange to blood red. Extraction from 1 liter of water results in a sensitivity of 1 ppb. This is suitable for quality control ofseafood. For use in measuring action levels (high and low ppt levelsfor aquaculture and drinking water, respectively), extraction from greater volumes will be required. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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