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目的了解茂名市出厂水及水源水中的微囊藻毒素的污染情况。方法于2010年6月至2011年5月,采用超快速液相色谱-质谱方法对茂名市水源水(良德水库、石骨水库出水口和石骨水库入水口)、茂名市山阁调蓄池水及茂名市河东水厂出厂水中的3种微囊藻毒素MC-RR、MC-LR、MC-YR含量进行动态监测。结果水源水水样中MC-RR、MC-LR、MC-YR的检出率分别为66.7%(24/36),58.3%(21/36),8.3%(3/36),检测范围分别为0.004～0.994、0.004～0.134、0.030～0.055μg/L,水源水中MC-RR在10月份出现高峰值(0.994μg/L)。4—9月调蓄池水中MC-LR的含量均高于水库水;而出厂水中MC-RR、MC-LR、MC-YR的含量均低于水库水,且仅检出MC-RR(0.008～0.012μg/L)。结论茂名市水源水主要以MC-RR、MC-LR的持续污染为主,出厂水受到低浓度MC-RR污染,饮用水安全存在一定的隐患。
Objective To understand the pollution of microcystins in the factory water and the source water of Maoming City. Methods From June 2010 to May 2011, ultra-fast liquid chromatography-mass spectrometry (MALDI-TOF-MS) was used to analyze the water resources of Maoming (Liangde reservoir, Shugu reservoir outlet and Shigu reservoir) Three kinds of microcystins MC-RR, MC-LR and MC-YR in the water of the pool and in the water of the factory of Hedong Water Plant in Maoming City were dynamically monitored. Results The detection rates of MC-RR, MC-LR and MC-YR in water samples were 66.7% (24/36), 58.3% (21/36) and 8.3% (3/36), respectively 0.004 ~ 0.994, 0.004 ~ 0.134 and 0.030 ~ 0.055μg / L, respectively. The peak value of MC-RR in water was 0.994μg / L in October. The content of MC-LR in the water from January to September was higher than that of the reservoir water. However, the contents of MC-RR, MC-LR and MC-YR in the ex-factory water were all lower than those of the reservoir water, and only MC-RR ~ 0.012 μg / L). Conclusion The main sources of water in Maoming were MC-RR and MC-LR, and the factory water was contaminated by low concentration of MC-RR, which posed potential risks to drinking water safety.