Objective: In order to survey water eutrophication and microcystin levels in Beijing Miyun Reservoir.
Methods: Mivrocystin-LR (MC-LR), and MC-RR were determinated by LC/MS/MS at 5 sample sites in Miyun Reservoir. Eutrophication parameters, which were determinated by conventional analytical methods, included algae number, chlorophyll-a (Chl-a), total phosphor (TP), total nitrogen (TN), COD,TOC, Fe, turbidity and water temperature.
Results: Water in Miyun Reservoir was polluted very little by organic matter. According to Chl-a, TP appraise criterion and grading method, Miyun Reservoir was eutrophicated very little. MC-LR and MC-RR could be detected out in water of Miyun Reservoir. Maximum concentration was discovered in September, MC-LR 41 ng/L and MC-RR 18 ng/L respectively.
Conclusion: Beijing Miyun Reservoir was poor-eutrophic. Microcystins concentration in water of Miyun Reservoir was far lower than our country health standard.