Instructions for collecting hair, nail, and special samples for DNA testing

A. Fingernail and toenail designs

Steps to follow:

Step 1:

• Prepare a clean sample envelope, clearly write your name or symbols on the envelope.

• The person who needs to collect the sample must wash his hands thoroughly.

Step 2:

• Use nail clippers or scissors to cut a piece of fingernail or toenail about the size of a grain of rice (it can be one piece or many pieces, as long as the amount is enough), then put it in an envelope with the name of the person needing the DNA test written on it, seal it, sign it, and seal the envelope.

• For each person you test for DNA, repeat the above steps, taking care to avoid confusing the samples.

• Put all sample envelopes in a large envelope, clearly write your full name and bring it to LOCI for testing. Or if you live far away, you can send it by post to LOCI Institute. Remember to write your phone number on the envelope. When we receive the sample, we will notify you and proceed with the testing.

B. Hair, fur, beard samples

Steps to follow:

Step 1:

• Prepare a clean sample envelope, clearly write your name or symbols on the envelope.

Step 2:

• Use tweezers or some other object to pluck about 5-7 hairs (fur, beard) with roots (roots), wrap them in a sheet of A4 white paper (avoid using tissue paper or soft paper) and put them in an envelope with the name of the person needing the DNA test written on it, seal it, sign it, and seal the envelope.

• For each person you test for DNA, repeat the above steps, taking care to avoid confusing the samples.

• Put all sample envelopes in a large envelope, clearly write your full name and bring it to LOCI for testing. Or if you live far away, you can send it by post to LOCI Institute. Remember to write your phone number on the envelope. When we receive the sample, we will notify you and proceed with the testing.

Note:

• Do not collect samples from children under 8 months of age because their hair is very fine and often has no roots when pulled out.

• Sample preservation time: samples after collection can be stored for several months or longer under normal conditions and can still be tested for DNA.

• For rootless hair models, please see Special Models section.

C. Special model

Urine samples, baby teeth, sperm, toothbrushes, chewing gum, condoms, blood stains on fabric, snot on blotting paper, cigarette butts… have the following sample collection steps:

Step 1:

• Prepare a clean sample envelope, clearly write your name or symbols on the envelope.

Step 2: How to get:

• Sperm, condom: soak into a clean cotton swab.

• Rootless hair: take 10 of the stiffest and largest strands.

• Toothbrush: take a toothbrush that has been used 2-3 times.

• Chewing gum, blotting paper, cigarette butts: use clean tongs to pick them up and put them in the envelope.

• Blood stains on fabric or semen on fabric: use scissors to cut out the part of fabric containing it and put it in an envelope.

• One of the above samples is put into an envelope with the name of the person needing the DNA test written on it, sealed, signed, and sealed.

• For each person you test, repeat the above steps, taking care to avoid confusing the samples.

• Put all sample envelopes in a large envelope, clearly write your full name and bring it to LOCI for testing. Or if you live far away, you can send it by post to LOCI Institute. Remember to write your phone number on the envelope. When we receive the sample, we will notify you and proceed with the testing.

Special samples have many different problems, you should please call the hotline for advice to get the most accurate and thoughtful instructions, ensuring the highest quality DNA test sample.