The effect of membrane filtration on estimates of microbial ATP in New Zealand freshwaters
作者:
R.D. Pridmore,
C.W. Hickey,
J. E. Hewitt,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1982)
卷期:
Volume 16,
issue 3-4
页码: 311-315
ISSN:0028-8330
年代: 1982
DOI:10.1080/00288330.1982.9515974
出版商: Taylor & Francis Group
关键词: ATP;micro‐organisms;freshwater;water properties;water analysis;water filtration;water sampling
数据来源: Taylor
摘要:
Concentrations of microbial ATP in 15 New Zealand lakes were determined using 2 extraction techniques. ATP was found in both the paniculate (>0.45 μm) and dissolved (<0.45 μm) fractions of the water samples. Higher concentrations of paniculate ATP were obtained when ATP was extracted directly from freshwater samples rather than following pre‐concentration on to membrane filters. Recovery of particulate ATP declined with increasing volumes of sample filtered. The magnitude of the filtration effect varied unpredictably between lakes and within lakes with time. Corrections for the presence of dissolved ATP were necessary before estimates of particulate ATP could be made by the direct extraction technique. Concentrations of dissolved ATP up to 1.2 μg L‐1were observed. The direct extraction technique is recommended for more accurate determination of particulate ATP in New Zealand freshwaters.
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