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DETERMINATION OF MICROCYSTINS FROM FRESHWATER PONDS IN MYMENSINGH, BANGLADESH

By: Sumaiya Ahmed, Sarah Subhana Islam , Md. Sagir Ahmed

Key Words: Cyanobacteria bloom, microcystins, eutrophication.

JLES-Vol-14-No-P-93-97, December 2019.

Abstract

A study was conducted on four shallow water ponds from January 2012 to December 2013 to determine the cyanobacterial bloom and its toxicity. Bloom samples were collected and filtered through a glass fiber filter. Filtered cells were extracted with Methanol-water and extracted sample was analyzed by High Performance Liquid Chromatography (HPLC) with UV, MS and MS-MS detections. Five types of microcystins viz., MC-RR (5.4µg/L), MC-YR (1.14 µg/L), MC-LR (2.0 µg/L), MC-WR (0.46 µg/L) and dm-MC-RR (0.36 µg/L) and two types microcystins viz., MC-RR (1.0 mg/l) and dm-MC-RR (0.04 µg/l) were detected from Pond 3 and Pond 4, respectively. MC-LR was found 2.0µg/g which is high than that of the provisional guideline. Very little amount of microcystins (1.04 µg/L) was found in Pond 4. Numerous MC congeners were found in an algal bloom but very little work has been done on the estimation of toxicological potency in bloom episode. More research is required to elucidate the lethal toxicity of different MC variants

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Sumaiya Ahmed, Sarah Subhana Islam , Md. Sagir Ahmed

DETERMINATION OF MICROCYSTINS FROM FRESHWATER PONDS IN MYMENSINGH, BANGLADESH

JLES-Vol-14-No-P-93-97, December 2019.

https://jlescience.com/les-publish/determination-of-microcystins-from-freshwater-ponds-in-mymensingh-bangladesh/

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