In the water quality environmental protection monitoring work, water sample collection is a very important link! The representativeness of the collected samples determines the accuracy, scientificity and rationality of the analysis results. In this paper, water quality online monitoring instrument manufacturers to understand together with you engaged in environmental water quality monitoring and quality assurance work in water sample collection problems! From the following five aspects:

1.Prepare the equipment Before sampling, prepare the sampling device and the container (such as a bucket) for storing the sample. If the sampling device is plastic or glass, it can be washed in accordance with the general washing method, but if it is iron, you need to use detergent to completely remove the oil, etc., and then rinse it with tap water, dry it and use it again, but the water sample collected can not be used for analysis of heavy metals.

2.The sample size depends on the measured items. Different measuring items have different water sample dosage and storage conditions, so the amount should be calculated according to the actual situation of the project and increased by 20~30% as the actual sample size. However, if the size of the sample container is limited and one sample cannot complete the work, multiple samples can be collected and mixed in a larger container before being loaded into the sample container.

3.The sampling method and water sample collection method are very important, and the water sample collected must be representative, so that the water sample can truly reflect the water quality of the whole water body.

4.In the investigation of water pollution, the collection of water samples for a water wash pollution investigation should consider the whole water area, set up a reasonable sampling point, and establish an online monitoring network of water pollution water quality, so as to timely and accurately analyze the water quality of the polluted lake, so as to understand the dynamic changes of various harmful substances in the water area!