对低含量水质样品采用了碱金属氢氧化物共沉淀，简化了样品富集程序，提高了测试灵敏度。
The alkali hydroxide co-precipitation for low content water sample is employed to simplify the sample enrichment process and the monitoring sensitivity is improved.
研究结果如下：(1)通过原始样品与样品富集物的比对，菌群群落结构出现差异性和重现性。
The results were as follows: (1) Compared the original sample with the sample of manual intervention, community structure appeared differences and reproducibility.
毛细管电泳样品电堆积富集过程可以浓缩样品组分，从而提高检测灵敏度，是一种有效的样品富集技术。
Sample stacking in capillary electrophoresis is one of the effective techniques to concentrate sample species, thus improving the detection sensitivity.
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