Check for Understanding VI - Presumptive Tests Extraction Methods Toxicology 8 Controlled Substances 5015 If forensic toxicologists find the presence of a toxin , they will need to extract that toxin from the sample in order to conduct confirmatory tests. True False

## Step 1<br />The problem is a statement about the process of toxicology testing. It states that if a toxin is found in a sample, it must be extracted before any confirmatory tests can be conducted.<br />## Step 2<br />This statement is indeed true. In the field of toxicology, the first step is to identify the presence of a toxin. This is done through presumptive tests, which are preliminary tests that indicate the presence of a specific substance.<br />## Step 3<br />Once the presence of a toxin is confirmed, the next step is to extract the toxin from the sample. This is done to prepare the sample for confirmatory tests, which are more specific and accurate than presumptive tests.<br />## Step 4<br />Therefore, the statement is true.