YSI6600V2水质多参数仪现场快速法与实验室分光光度法测定湖泊藻类叶绿素的比较

通过将YSI6600V2水质多参数仪测得的叶绿素a值与实验室分光光度法叶绿素a测定值进行比较,分析了YSI6600V2多参数水质监测仪测定叶绿素a的准确性与局限性。结果表明,YSI6600V2测定值多数偏低,且相关性较差。将YSI6600V2测得的蓝藻密度样本分为2类后,相关性得到显著提升。提出了利用蓝藻密度对样本进行分类后,分别进行叶绿素a校正的方法,并说明了此种校正方法的局限性。

Comparison of Onsite YSI6600V2 Multi Parameter Water Quality Meter and Laboratory Spectrophotometry for the Determination of Lake Algal Chlorophyll

In this study, we compared the measured values of chlorophyll a by both YSI 6600V2 multi-parameter water quality meter and laboratory spectrophotometry , and explored the accuracy and limitations of the measurement by the YSI 6600V2 multi-parameter water quality monitor.The results showed that the majority of the measured values by YSI 6600V2 was low and had poor correlation. After dividing the cyanobacteria samples into two categories according to their measured dentistry by YSI 6600V2, the correlation was significantly improved .We proposed the use of a correction method for chlorophyll a measurement after classifying the cyanobacteria samples based on the density , and illustrated the limitations of this method .