Sampling Procedures in Petrol Pumps

Correct Sampling procedures are extremely important if accurate information is to be obtained from the sample being taken.
Improper containers or badly drawn non-representative samples can cause laboratory results to be meaningless.
It is most important that the person assigned to take samples must be trained for this responsibility and is competent.

Sampling is very important phenomenon for the quality control. Samples are drawn for the purpose of ascertaining the conformity of the stock/product to the relevant specifications. For taken the samples from storage tanks we use the weighted sampling cage. To ensure the good sample we follow a sampling procedure:
1. The sampling bottle and sample containers shall always be kept clean.
2. Before use, they shall be rinsed with the product under sampling.
3. Only the type of sample required for the relevant specification to be tested, shall be taken.
4. The sample quantity collected shall be sufficient for carrying out the relevant tests.
5. Sample shall be taken preferably during the cooler part of the day and under shade.
6. The sample container shall be filled maximum 95% of the container capacity. Properly closed and it shall be ensured that there are no leaks.
7. Sample details shall be entered in the form as applicable and fixed to the container.
8. An depot attendant / dealer well conversant with the procedure shall personally supervise sampling and filling of the sample container.