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Drugs of Abuse - Urine Testing

RELIABLE DRUG & ALCOHOL DETECTION.


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Redwood Toxicology Laboratory, Inc. (RTL) utilizes the most sophisticated, sensitive and specific equipment and technology available to screen, confirm and quantitate drugs of abuse in urine. Our methodologies provide highly accurate, legally defensible results. As with all of RTL's testing options, full customer support is provided.

RTL's objective is to help its clients detect and prevent drug and alcohol abuse. Urine testing through RTL is reliable, affordable and convenient. Turn to RTL for confidence in testing—we'll find out.

Our professional toxicologists perform screening and confirmation with state-of-the-art technology and equipment. After initial screening for presumptive positives, we quantitatively confirm by thin layer chromatography (TLC), radioimmunoassay (RIA), gas chromatography (GC), gas chromatography/mass spectrometry (GC/MS), or liquid chromatography/mass spectrometry/mass spectrometry (LC/MS/MS).

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Start Testing for Drugs of Abuse in Urine

   FEATURES AND BENEFITS:
  • Urine screening and confirmation with fast, accurate results

  • Wide range of drug test panels available

  • Lab analysis provides confirmative evidence of use and defensible results

  • Fast turn around time from receipt of specimen (24 hours1 negative, 24-72 hours positive)

  • Toll-free customer support services with access to board certified toxicologists

  • Numerous report options available including, web-based test management solution for all clients

    •    » Download datasheet [PDF]

View service documentation online or download Adobe PDF files to ensure you have what you need to conduct effective drug tests.

Documents
   » DRUGS OF ABUSE - URINE TESTING: DATASHEET [PDF]

Cut-off Levels
   » SCREENING CUT-OFF LEVELS

URINE SCREENING METHODOLOGY

In order to determine if a urine specimen is negative or positive for drugs of abuse, all specimens are initially screened by an enzyme immunoassay (EIA) procedure. Specimens that yield an EIA response below the specified cut-off are reported as "none detected". Any specimen that shows an EIA response at or above the specified cut-off is considered "presumptive positive" for a particular drug or drug class. Based on your agency's account, presumptive positive specimens may be confirmed by a second method prior to reporting positive results. (See "urine confirmation methodology" below).
  SCREENING CUT-OFF LEVELS BY EIA        Cut-off levels updated periodically.
  Drugs of Abuse   EIA Cut-off   
  Amphetamine
   500/1000 ng/mL   
  Methamphetamine   1000 ng/mL   
  Barbiturates   200 ng/mL   
  Benzodiazepines   200 ng/mL   
  Buprenorphine   5 ng/mL   
  Cocaine Metabolite (Benzoylecgonine)   150/300 ng/mL   
  Ethanol   0.04 gm/dL   
  Methadone   150 ng/mL   
  Methadone Metabolite   150 ng/mL   
  Methaqualone   300 ng/mL   
  Opiates (morphine and codeine)   300 ng/mL   
  Oxycodone   300 ng/mL   
  Phencyclidine   25 ng/mL   
  Propoxyphene   300 ng/mL   
  Synthetic Cannabinoids   View details »   
  THC (cannabinoids)   20/50 ng/mL*   

* Agency has the ability to choose cut-off levels indicated.
Hide Cut-off Levels.

   » CONFIRMATION CUT-OFF LEVELS

URINE DRUG TEST CONFIRMATION METHODOLOGY

Analytical methods of confirmation include thin layer chromatography (TLC), radioimmunoassay (RIA), gas chromatography (GC), gas chromatography/mass spectrometry (GC/MS) or liquid chromatography/mass spectrometry/mass spectrometry (LC/MS/MS). The subsequent confirmatory procedures are performed on a second independent portion of the original urine specimen.
  CONFIRMATION CUT-OFF/LOQ LEVELS BY PROCEDURE      Updated periodically.
  Drug   TLC   RIA   GC/MS   LC/MS/MS  
  Alcohol (ethanol)           .02 gm/dL
(GC-FID)1		      
  Amphetamines
 - Amphetamine
 - Methamphetamine
 - MDMA
 - MDA		  
< 500 ng/mL
< 500 ng/mL
< 500 ng/mL
< 500 ng/mL		      
250 ng/mL
250 ng/mL
250 ng/mL
250 ng/mL		      
  Barbiturates   < 500 ng/mL       200 ng/mL      
  Benzodiazepines       200 ng/mL       50 ng/mL  
  Buprenorphine               0.5 ng/mL  
  Cocaine2       150 ng/mL   100 ng/mL      
  EtG               100 ng/mL  
  EtS               25 ng/mL  
  Fentanyl           5 ng/mL      
  GHB           10 mcg/mL      
  Marijuana Metabolite
(THC-COOH)		       25 ng/mL       5 ng/mL  
  Methadone   < 500 ng/mL       100 ng/mL      
  Methaqualone   < 500 ng/mL              
  Opiates
 - Total Morphine
 - 6-Monoacetylmorphine
 - Hydrocodone
 - Hydromorphone
 - Oxycodone
 - Noroxycodone
 - Codeine		  
< 500 ng/mL

1000 ng/mL
1000 ng/mL
1000 ng/mL

< 500 ng/mL		          
100 ng/mL
5 ng/mL
100 ng/mL
100 ng/mL
50 ng/mL
50 ng/mL
100 ng/mL		  
  Phencyclidine (PCP)           10 ng/mL      
  Propoxyphene   < 500 ng/mL       200 ng/mL      
  Synthetic Cannabinoids               View details »  
  Tricyclic Antidepressants
 - Amitriptyline
 - Desipramine
 - Imipramine
 - Nortriptyline
 - Maprotiline
 - Doxepine		          
50 ng/mL
50 ng/mL
50 ng/mL
50 ng/mL
50 ng/mL
100 ng/mL		      

1. Test performed by Gas Chromatography Flame Ionization Detection.
2. Cocaine Metabolite Benzoylecgonine

Hide Cut-off Levels.

Additional Information & Resources
   » LAB TECHNOLOGY AND EQUIPMENT
   » LAB TEST SUPPLIES
   » URINE COLLECTION PROTOCOL
   » URINE SPECIMEN LABELING
   » ON-SITE SCREENING DEVICES

If you would like to place an order, check prices or inquire about test features — please call 1-800-255-2159. You can also complete the online form below. All requests made during non-business hours will be responded to as early as possible the next business day.

     
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  Rapid Drug Test Devices (Reditest)   Lab Drug Test - Urine   
  Lab Drug Test - Saliva   Comprehensive Drug Test   
  EtG/EtS Alcohol Testing     Steroid Testing   
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  Urine Synthetic Cannabinoids     Saliva Synthetic Cannabinoids   
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To learn more about routine Drugs of Abuse Urine Testing call:   800-255-2159
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1. Excludes specimens received Saturday.