EtG (Ethylglucuronide)

Traditional EtG (Ethylglucuronide) testing vs. the new Immunoassay testing.

Note: EtG (Ethylglucuronide) is a sensitive biomarker of ethyl alcohol (EtOH) exposure; a low-level positive EtG could result from sources other than beverage alcohol.

EtG Comparison
EtG Incidental Exposure
EtG FAQ

EtG by LC/MS/MS

Immuno - EtG

Screen Method*

LC/MS/MS
Liquid Chromatography/Tandem Mass Spectrometry

Immunoassay

Screen Cutoff*

250 ng/mL
100ng/mL and 500ng/mL available

500 ng/mL
no Quantitation on screen only

Confirmation Method

LC/MS/MS
(Automatic and included)

LC/MS/MS
(Available at an additional $19.50 by request or Automatic.)

Confirmation Cutoff

250 ng/mL
with Quantitation
100ng/mL and 500ng/mL available

250 ng/mL
with Quantitation

Interferences

None known

Undetermined,
but some may occur

Advantage

State of the art reference method

Rapid Screen Results:
within 24hrs of receipt
at SRL laboratories

Price

Call for Pricing
Positives Confirmed

Call for Pricing
(Confirmation available at additional fee,
as per above.)

*IMPORTANT NOTE: A screened positive result is considered presumptive. A small percentage of screen only positive results will not confirm by an alternative method. Therefore, for the protection of all involved parties, no punitive action should take place without the donor being afforded the opportunity to have positive screen result(s) confirmed by LC/MS/MS.