A New Method for Determination of Chlorophylls in Freshwater Algae |
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Authors: | Ting-Lin Huang Hai-Bing Cong |
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Institution: | (1) School of Environmental and Municipal Engineering, Xi’an University of Architecture & Technology, 13 Yanta Road, Xi’an, 710055, Shaanxi province, China |
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Abstract: | A new method (NMM, using acetic acid fiber filter and 90% ethanol) was established to determine chlorophyll in freshwater
algae, and it was compared with US standard method (USM, using glass fiber filter and 90% acetone) and the method recommend
by EPA of China (CHM, using acetic acid fiber filter and 90% acetone). The precision and repeatability of NMM is equivalent
to that of USM, but NMM is safer to laboratory workers than USM and CHM because ethanol was used as solvent in NMM instead
of acetone used in USM and CHM, and time and money were also greatly saved by the new method. The precision and repeatability
of CHM was much less than USM and NMM, and the advice improving the method was proposed that the extraction time must be prolonged. |
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Keywords: | Chlorophylls Spectrophotometry Glass fiber filter Acetic acid fiber filter Acetone Ethanol |
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