Commonly Used Sample Preservation Techniques for Laboratory Water – Table 1 (Suspended Solids and Sediments, etc.)

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Common Water Sample Preservation Techniques

The table lists the requirements for water sample preservation techniques. The preservation time, container material selection, and application of preservation measures all depend on the components and properties of the sample. However, real-world water samples vary greatly; therefore, the requirements listed in the table are not absolute guidelines. Each analyst should verify the applicability of these requirements in their specific work, and the methods for sample collection and preservation should be clearly specified when developing analytical method standards.

Furthermore, if there are incompatibilities between the analytical method to be used and the protective agent and container material, it is often necessary to take several samples from the same water body and analyze them using different preservation methods to determine the most suitable protection method and container.

Common Sample Preservation Techniques – Table 1

(This table only contains general requirements for sample preservation. Due to the complex properties of natural water and wastewater, the stability of each type of sample treated according to the following methods needs to be verified before analysis.)

1 Project to be tested		2 Container Category	3 Save method	4 Analysis location	5 Storage time	6 suggestion
A thing reason , change study and born change point Analysis	PH	P or G		on site		On-site direct testing
	Acidity and redemption	P or G	Refrigerate in the dark at 2-5°C.	laboratory	24h	The water sample filled the container
	nirvana	G		laboratory	6h	It is best to conduct the test on-site.
	electrical conductivity	P or G	Refrigerate at 2-5℃	laboratory	24h	It is best to conduct the test on-site.
	Color	P or G	Refrigerate in the dark at 2-5℃	On-site, laboratory	24h
	Suspended matter and sediment	P or G		laboratory	24h	Individual volumetric sampling
	Turbidity	P or G		laboratory	ASAP	It is best to test on-site.
	ozone			on site