SVT™ S-U-DS™ (Surfactant) Reagent
U.S. Patents and Patents Pending.
Usage: This assay is not for use in diagnosing disease or illness to effect treatment, and/or cure; it is
For Forensic / Toxicology use to detect the presence of surfactant(s) in urine submitted for drugs of
Method: Colorimetric : Endpoint.
Principle: Surfactants, if present, reacts with the reagent containing a cyclic indicator compound to
yield a color complex, which is read on an automated analyzer, or manually, at 450 nm.
Storage and Stability: Store at 2-10°C. The reagent is stable until expiration date on the container.
Specimen Collection & Preparation: The Surfactant reagent may be used on any freshly voided
urine specimen or urine collected under special conditions, such as first-morning specimens and post
-prandial urine. The urine, collected in a clean container, should be tested as soon as possible (do
not centrifuge or use preservatives). If testing cannot be performed within one hour after collection,
the specimen should be refrigerated at 2-10° C immediately and returned to room temperature before
Federal Guidelines State for the Analysis of Surfactants:
Specimen Validity Testing Prepared by: Division of Workplace Programs Posted: February 2005
Under Section (7): (7) The presence of a surfactant is verified by using a surfactant colorimetric test
with a greater than or equal to 100 mcg/mL dodecylbenzene sulfonate-equivalent cutoff for the initial
test on the first aliquot and a different confirmatory test (e.g., multi-wavelength spectrophotometry)
with a greater than or equal to 100 mcg/mL.
All urines collected should be handled as potentially infectious.
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