Poisoning test is an effective means to test drug addicts, which can find out the degree of drug abuse of drug addicts-anyone who walks by will leave traces. After injecting or taking drugs, besides urine, other substances such as sweat, feces, tears, hair, nails, etc. They all contain used drugs or drug metabolites to some extent, so they can be used as evidence for drug testing.
As long as you don't cut your hair, you can completely present the drug abuse process in the past few months, which is considered to be one of the most effective methods at present. Although dyeing hair will make the test results discounted, whether there is drug abuse can still be tested, and any hair can be tested, but hair is the most convenient sample to obtain.
Extended data:
Code for detection of hair samples of drug-related personnel;
Rule number one In order to standardize the hair sample testing of drug-related personnel and give full play to the positive role of hair sample testing in handling drug-related cases, this specification is formulated in accordance with the Provisions on Drug Abuse Testing Procedures.
Rule number two The term "hair sample detection" as mentioned in this specification refers to the activity of using scientific and technological means to detect the hair samples (hairs) of drug addicts and provide scientific basis for public security organs to identify drug abuse behavior.
Rule three. When collecting hair samples, the staff should wear disposable gloves, use medical scissors or serrated scissors to cling to the scalp surface of the person being collected, and cut off the hair at the back of the head (if enough hair cannot be extracted from the back of the head, the head closest to this part can be selected), and the length should not exceed 3 cm; Hair longer than 3 cm needs to be cut 3 cm from the root end.
Article 4? The extracted hair samples should be divided into two parts, A and B, with each part weighing not less than 50 mg, wrapped in aluminum foil paper and then put into paper envelopes respectively.
Information such as sample number, date of extraction, and extractor shall be filled in the envelope, and the seal of the envelope shall be confirmed by the fingerprint and signature of the extractor. If the person being extracted refuses to press the fingerprint or signature, the extractor shall indicate it and record the whole process of extraction.
Article 5? Hair extractors shall make a hair sample extraction information table, and record the information such as the name, ID number, hair type, extraction location, extraction unit, extraction personnel, extraction time, etc.
Article 6? Different people's hair should be extracted separately, packaged separately and numbered uniformly. When sampling, the residue on the extraction equipment should be cleaned up in time to ensure that the samples are not cross-contaminated.
Article 7? The extracted hair samples shall be stored in a room temperature, dark, dry, ventilated and clean environment, and shall not be stored in the same room as the seized drugs. Samples suspected of having risks such as infectious diseases shall be kept according to relevant regulations.
Article 8? On-site inspection or laboratory inspection shall be conducted in a timely manner in accordance with the relevant provisions for the extracted hair samples.