Stool samples can help doctors diagnose some health conditions. Tips for collecting a stool sample include urinating before collecting the sample and using any tools that the sample kit provides.

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Representative sampling and random sampling ...

Sample Treatment is, without any doubt, the backbone of chemical analysis. Always underestimated, many times neglected, sample treatment needs to be recalled from the limbo in which it has been thrown ...