Monday, January 11, 2010

writen by me~~

Question one :

What do you learn from the above experiment?

From this experiment, we can learn how to do a proper sampling. As we know, if we want to examined all of population or sample it will affect our time consuming and high cost were involve. Based on sampling experiment that have been done, we need sampling technique to explain the cases or activity that take part in the selection (choose ) and collection of food sample. Then, the sample will be analyzed based on their number, sizes, and nature. There are three main principles that need to be ware which are the need for systematic reduction of sample, the necessary to reduce particle size without loss or destruction of nutrients and without chemical contamination. And it also need for through mixing to produce a homogeneous laboratory sample that will be yield analytical portions representative of the whole, ( laboratory procedure : 2010). The sampling technique are different in represent the solid, liquid and semi-solid samples. The needs of proper sampling are important to ensure that sample taken is truly representative and to ensure the quality or value that we get. Then, we learn how to doing proper sampling in laboratory. On that day, we use cereal base product which is legume or nuts. This procedure is follow the three main principle which are homogenization, reduction of size and mixing.

( 1st quartering ) ( 2nd quartering )

The sample was divide into four then, the section ( A+D) and (B+C)
section equally. also was mixed together and both
are divided to four equally again.

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