In the case of very viscous or creamy liquids more incremental samples at different heights are necessary. The sampler is lowered through the hatch of the tank until it reaches the desired level, opened and kept in position until it is filled and then finally hauled up. The minimum incremental samples required are given in the following table:ĭipping vessels (Sampling tool L02-01, L02-02) may be used to draw the samples. When there are serious concerns about obtaining a representative sample consult the customs laboratory regarding the sampling plan.ģ - top sample – approx 10 cm to 20 cm from the liquid surface (depends on the volume / height of the container)Ĥ - upper sample – 5/6 of height from bottom to surfaceĥ - middle sample - 3/6 of height from bottom to surfaceĦ - lower sample - 1/6 of height from bottom to surfaceħ - outlet sample – From the outlet valveĮqual quantities of upper, middle, and lower spot samples are taken from positions Nos 4, 5, and 6 (shown in the picture).
![started from the bottom sample started from the bottom sample](https://www.rit.edu/ntid/sea/sites/rit.edu.ntid.sea/files/images/pgsHourglass_top.gif)
If the products are non-homogenous due to their nature, and homogenization is not possible, a larger number of incremental samples must be taken at various spots (depths) to ensure that a representative sample is obtained.
![started from the bottom sample started from the bottom sample](https://devtoolstips.org/assets/img/sample-colors-from-the-page-1.gif)
In some cases it may be difficult or impossible to take more than a single sample, however, if you are satisfied that the product is homogenous a single sample may be taken as representative of the consignment. The guidance in the following sections explains how you should sample heterogenous products which will require a number of incremental samples to ensure the sample is representative.
![started from the bottom sample started from the bottom sample](https://cdn.quotesgram.com/img/78/86/257674552-Drake_-_Started_From_The_Bottom.png)
This section covers the sampling of liquid products at ambient temperatures.Ĭhapter General information of sampling gives some information about homogeneous and heterogeneous products.