Therefore, it has an important value to monitor its concentration and develop monitoring instrument.
但由于这类农药能造成土壤和水资源的污染，故实现对其浓度的监测具有重要意义。
The value of concentration when the flaw detection effect is the best is given.
给出了最佳探伤效果时的浓度值。
The effect of the eluent concentration on retention value was studied.
研究了淋洗液浓度对保留值的影响，当淋洗液浓度增大时，保留值减小。
The effect of the eluent concentration on retention value was studied.
研究了淋洗液浓度对保留值的影响，当淋洗液浓度增大时，保留值减小。
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