Specimen Collection - Saliva

Oral fluid collection

RTL-Oral Fluid Collection and Shipping


  1. Peal OpenRemove the kit contents from the packaging. Save the outer packaging because the specimen must be placed in the re-closable outer packaging for shipment to the laboratory.

  2. Peel open the collector pad package and remove the collection device. Do not touch the pad.

  3. Peal OpenPlace the collector pad under the donor's tongue and instruct the donor to close his/her mouth. The donor must not chew or suck on the pad. When the indicator window turns blue, remove the collection device from the donor's mouth. DO NOT remove the collection device until the indicator turns blue. If the indicator does not turn blue within 15 minutes, remove the collection device and discard. Re-collection with a new device may begin immediately after saliva has accumulated in the donor's mouth.

  4. Peal OpenHolding the transport tube in an upright position, remove the cap, and insert the collector device, pad first, into the tube. DO NOT set the transport tube on a table. If any of the buffer fluid is spilled, a new transport tube must be used. The amount of liquid in the transport tube is critical to the testing process.

  5. Push the cap firmly onto the transport tube until you hear the SNAP. Gently shake the tube to mix the saturated collector pad with the buffer.

  6. Peal OpenWrite the collection date on the security seal, peel the seal off the test request form and place it across the cap (see diagram on test request form for instructions).

  7. Have the donor initial the security seal to indicate the specimen was sealed in the donor's presence. Please do not use red ink or felt tip pens. Blue and black ballpoint pens are preferred.

  8. Complete the information on the test request form. (See labeling & shipping instructions).

  9. Peal OpenPlace the transport tube into the original outer packaging provided with the collector device. Place the collection device and top copy of the test request form in the supplied shipping pack or U.S. mailer box.

  10. Send the specimen(s) to Redwood Toxicology Laboratory for testing. Keep the second copy of the test request form for your records. The specimen should be received by the laboratory within seven days of the date of collection. (See labeling & shipping instructions).


The sample cannot be processed without the information supplied on the test request form. If the test request form does not accompany the specimen, testing will be delayed. Please follow these guidelines when shipping your specimen(s) to the laboratory:

  • Five or more specimens: Please use the lab pack provided by RTL
  • Fewer than five specimens: Please use the pre-paid U.S. mailer boxes
  • Oral fluids and urine may be sent in the same lab pack provided by RTL when sending five or more specimens (e.g. three urine specimens and two oral specimens).
  • Please do not mix oral fluid and urine specimens in the same postage-paid mailer box! Per U.S. Postal Service regulations, use the box provided specifically for each type of test as indicated on the pre-paid label.

Contact Us

Laboratory: 800-255-2159

Products: 877-444-0049