Instructions when sending us a sample(s):

  1. Affix a label to the sample container identifying the type of sample you are requesting us to test.
  2. For pesticide tests we would prefer that you send the sample material in a 2 to 5 gram plastic vial or container. For all other tests we would prefer a one quart size metal canister or a one quart size hard plastic container. However, feel free to call us at (405) 948-8889 regarding any sample or sample size related questions.
  3. Include with the sample a short note stating the test(s) you are requesting.
  4. Identify yourself for invoicing purposes. If you are a current customer, including your name and address or plant location is sufficient. If you are not a current customer, please include your name, address, phone and fax numbers, principal contact info ( names, number and email addresses ) and invoicing instructions ( send invoice to P.O. Box, street address, etc. )

Our telephone number is (405) 948-8889.  It is answered by us from 8:00A.M. to 5:00 P.M. Central Standard Time Monday through Friday.  Outside those designated hours you may leave a recorded message.  You may also fax or email us at

Below are our street and mailing addresses; they are enlarged and in bold font so that you may drag and drop them into your word processor for printing on a local printer.

For commercial delivery services such as UPS, FedEx, etc please us the following:

Isotek Laboratories, LLC

5225 NW 5th Street

Oklahoma City, OK  73127

Checks and regular mail should be sent to our P.O. Box address:

Isotek Laboratories, LLC

P.O. Box 271074

Oklahoma City, OK  73137

NOTE:  Please include specific instructions WITH the sample(s) and follow the three i’s of sample submission (identification, instructions and invoicing) as described on this Sending page.