2021 Special Study PT Program

A limited time special study.

General Instructions for Participants

Thank you for your interest in the 2021 Special Study PT Program for cannabis and hemp testing facilities. This section contains an overview of details relating to enrollment, the proficiency testing process, and instructions for result submission.

PLEASE NOTE: This is NOT a part of the Emerald Test™ ILC/PT.
This is a one-time Special Study. Participants will receive statistical data for any tests which they participate in.
Full statistics will only be available for tests with more than 8 enrollees.
There will be no Emerald Badges awarded.

Please read this document thoroughly. Please address all questions to sales@emeraldscientific.com or your Technical Sales Specialist

To Enroll in 2021 Special Study PT Program, simply scroll down and purchase individual PTs from the options below, or contact us at sales@emeraldscientific.com, or (877) 567-3598 ext. 1. If you’re not sure which PTs to purchase, your Emerald Scientific Technical Sales Specialist is always available to answer questions and help.

Enrollment has closed. 

Enrollment:September 10 – 17
Samples ship:September 22 – 27
Results reporting for all PTs closes:Tuesday, October 12
Individual Reports released:Friday, October 29

The dates that samples will be shipped and the date that results are due are both listed above and in the instructions included with the PT samples. Prior to opening the sample, please review the sample preparation instructions.  To accommodate the PT, please follow the manufacturers’ sample preparation notes that go with each part number.

If samples shipped within the U.S. and Canada are not received within 48 hours of the ship date, notify the PT manufacturer. Failure to do so after 5 working days from the ship date may result in a forfeited test. International shipments may take longer.

Be sure to thoroughly inspect all samples and review all documents upon receipt and store under the conditions recommended by the ISO accredited PT manufacturer. Damaged samples should be reported immediately to the PT Manufacturer and Ken Groggel. Failure to do so within 1 week of the ship date may result in a forfeited test.

Each participant is responsible for selecting an analysis method appropriate for the samples they are testing. Some series will request that the participant list their analysis method in a general fashion (e.g. LC, GC, PCR, LC-MS/MS, etc.). The method provided will be entered with their results in the appropriate boxes on the results entry form. This anonymized data is used to monitor developments or changes in methods within the industry and to assist in future test development. Contact the ISO accredited PT manufacturer if you have any questions or concerns regarding the reporting process.

Enrollment in 2021 Special Study PT Program is a participant’s implied assertion that the laboratory name provided when purchasing the PTs is the laboratory that performs the sample analysis. Any attempt to circumvent this agreement will result in a forfeited test.

Carefully follow the ISO accredited PT manufacturer’s instructions when submitting your results. Sample results must be submitted by the due date. Late results will not be accepted, will not be added to the database, and will be treated as unreported. Typographical errors will not be considered for an appeal.

If you DO NOT want to report results for a particular analyte within the PT, leave it blank.  Any number or image within an analyte cell will be viewed as a testing outcome and scored as such.

Accurate data reporting is part of the analysis process, thus all participants are responsible for review of their own reported results to ensure accuracy. Be sure to review the documents included with the PT samples for data entry instructions. It is recommended that a second person review your reported results for accuracy. Contact the ISO accredited PT manufacturer if you have any questions or concerns regarding the reporting process. Incorrectly reported results will not be changed after the Series closing date. There are no exceptions.

There are 2 separate internet portals for labs to enter their PT results, one for each manufacturer.  Review and follow the directions provided by the ISO accredited PT manufacturer, which will include the information for the correct portal to use to enter your results. Participant access to reports is limited to their enrolled tests. 

Contact the PT manufacturer of your PT(s) directly with any questions.

Individual reports will be available from the PT manufacturer by October 29, 2021. If the facility name, analyst email, and physical address for the lab performing the PT analysis are not correct when the sample is purchased, your results may be delayed or voided. It is recommended that you review your report carefully and direct any questions to the PT manufacturer before entering the data.


Not sure you’re ready to participate in this Special Study, but want to start a PT program for your lab? 

No problem, we’ve got you covered! The best cannabis proficiency tests on the market are just a click away!

Shop specific PTs including metals, microbiology, pesticides, pH, potency, residual solvents, terpenes, water activity tests, and more!

This 2021 Special Study PT Program offered a select range of PTs to meet a laboratory’s internal SOP, regulatory compliance, and ISO/IEC accreditation needs. The details of each are available for your review below

2021 Special Study PT Details

7 part Potency in Hemp Oil
Cannabinoid analysis
Components: Hemp Oil matrix (1 mL sample, 10 – 1,000 µg/g)

  • Δ9-Tetrahydrocannabinol (THC) CAS# 1972-08-3
  • Δ9-tetrahydrocannabinolic Acid (THCA) CAS# 23978-85-0
  • Cannabidiol (CBD) CAS# 13956-29-1
  • Cannabidiolic Acid (CBDA) CAS# 1244-58-2
  • Cannabinol (CBN) CAS# 521-35-7
  • Cannabigerol (CBG) CAS# 25654-31-3
  • Δ8-Tetrahydrocannabinol (THC) CAS# 5957-57-5

A Practice Test, CRM, and Blank Matrix may be purchased in addition to this test.

5 part Potency in Hemp Bud
Cannabinoid analysis
Components: Hemp Bud matrix (1g sample, 10 – 80,000 µg/g)

  • Δ9-Tetrahydrocannabinol (THC) CAS #1972-08-3
  • Δ9-tetrahydrocannabinolic Acid (THCA) CAS# 23978-85-0
  • Cannabidiol (CBD) CAS# 13956-29-1
  • Cannabidiolic Acid (CBDA) CAS# 1244-58-2
  • Cannabinol (CBN) CAS# 521-35-7

A Practice Test, CRM, and Blank Matrix may be purchased in addition to this test.

4 part Heavy Metals in Hemp Oil
Heavy Metals analysis
Components: Hemp oil matrix (0.5 g sample, varied µg/g)

  • Arsenic CAS# 7440-38-2
  • Cadmium CAS# 7440-43-9
  • Lead CAS# 7439-92-1
  • Mercury CAS# 7939-97-6

A Practice Test, CRM, and Blank Matrix may be purchased in addition to this test.

Pesticide Screening in Hemp
Pesticide analysis

The sample will be evaluated quantitatively for the following residues in hemp. At least 25% will be present at 0.30 to 3.00 ppm. Each PT is supplied with a blank matrix and 3 mL (2 x 1.5 mL) of spiking solution to allow for duplicate analysis if needed. Sample must be analyzed in its entirety to assure intra sample homogeneity. 

A Practice Test and Blank Matrix may be purchased in addition to this test.

Analyte / CAS #Analyte / CAS #Analyte / CAS #
2-Chloroethyl phosphonic acid 16672-87-0Dimethomorph 110488-70-5Myclobutanil 88671-89-0
Abamectin (B1B / B1A) 71751-41-2Dinotefuran 165252-70-0Naled 300-76-5
Acephate 30560-19-1Diuron 330-54-1Novaluron 116714-46-6
Acequinocyl 57960-19-7Dodemorph 1593-77-7Oxamyl 23135-22-0
Acetamiprid 135410-20-7Endosulfan sulfate 1031-07-8Paclobutrazol 767738-62-0
Aldicarb 116-06-3Endosulfan-alpha 959-98-8Pentachloronitrobenzene 82-68-8
Allethrin 584-79-2Endosulfan-beta 33213-65-9Permethrin 52645-53-1
Ancymidol 12771-68-5Ethoprophos 13194-48-4Phenothrin 26002-80-2
Atrazine 1912-24-9Etofenprox 80844-07-1Phosmet 732-11-6
Avermectin 71751-41-2Etoxazole 153233-91-1Piperonyl butoxide 51-03-6
Azadirachtin 11141-17-6Etridiazol 2593-15-9Pirimicarb 23103-98-2
Azoxystrobin 131860-33-8Fenhexamid 126833-17-8Prallethrin 23031-36-9
Benzovindiflupyr 1072957-71-1Fenoxycarb 72490-01-8Propiconazole 60207-90-1
Bifenazate 149877-41-8Fenpyroximate 111812-58-9 & 134098-61-6Propoxur 114-26-1
Bifenthrin 82657-04-3Fensulfothion 115-90-2Pyraclostrobin 175103-18-0
Boscalid 188425-85-6Fenthion 55-38-9Pyrethrins 8003-34-7
Buprofezin 69327-76-0Fenvalerate 51630-58-1Pyridaben 96489-71-3
Captan 133-06-2Fipronil 120068-37-3Pyriproxyfen 95737-68-1
Carbaryl 63-25-2Flonicamid 158062-67-0Resmethrin 10453-86-8
Carbofuran 1563-66-2Fludioxonil 131341-86-1Spinetoram 187166-15-0 & 187166-40-1
Chlorantraniliprole 500008-45-7Fluopyram 658066-35-4
Spinosad 168316-95-8
Chlordane 57-74-9Flurprimidol 56425-91-3Spirodiclofen 148477-71-8
Chlormequat chloride 999-81-5Hexythiazox 78587-05-0Spiromesifen 283594-90-1
Chlorphenapyr 122453-73-0Imazalil 35554-44-0Spirotetramat 203313-25-1
Chlorpyrifos 2921-88-2Imidacloprid 138261-41-3Spiroxamine 118134-30-8
Clofentezine 74115-24-5Iprodione 36734-19-7Tebuconazole 107534-96-3
Clothianidin 210880-92-5Kinoprene 42588-37-4
Tebufenozide 112410-23-8
Coumaphos 56-72-4Kresoxim-methyl 143390-89-0Teflubenzuron 83121-18-0
Cyantraniliprole 736994-63-1Lambda-Cyhalothrin 91465-08-6Tetrachlorvinphos 22248-79-9
Cyfluthrin 68359-37-5 & 1820573-27-0Malathion 121-75-5Tetramethrin 7696-12-0
Cypermethrin 52315-07-8Metalaxyl 57837-19-1Thiabendazole 148-79-8
Cyprodinil 121552-61-2Methiocarb 2032-65-7Thiacloprid 111988-49-9
Daminozide 1596-84-5Methomyl 16752-77-5
Thiamethoxam 153719-23-4
Deltamethrin 52918-63-5Methoprene 40596-69-8Thiophanate-methyl 23564-05-8
Diazinon 333-41-5Methyl parathion 298-00-0Trifloxystrobin 141517-21-7
Dichlorvos 62-73-7Mevinphos 7786-34-7
Dimethoate 60-51-5MGK-264 113-48-4

Residual Solvents in Solution
(39 components in 1,2,4-trimethylbenzene; 2 x 2.0 mL sample, 10 – 1,000 µg/g)

A practice test, Blank Matrix, and CRM may be purchased in addition to this test.

ComponentsCAS #
2-Methylbutane (Isopentane)78-78-4
Diethyl ether (Ethyl ether)60-29-7
Ethyl acetate141-78-6
Ethyl benzene100-41-4
Ethylene glycol107-21-1
Ethylene oxide75-21-8
Isopropanol (2-Propanol)67-63-0
Isopropyl acetate108-21-4
Methylene chloride75-09-2