SVT™ Halogen (Bleach) Reagent
U.S. and Foreign Patents and Patents Pending: 6,537,823.
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 Halogen(s) in urine submitted for drugs of abuse
testing. This assay is semi-quantitative.
Method: Colorimetric : Endpoint.
Principle: Halogen(s), if present, reacts with the reagent containing a substituted biphenyl compound to
yield a color complex, which is read on an automated analyzer, or manually, at 660 nm.
Storage and Stability: Store at 2-10°C. The reagent is stable until expiration date on the container.
Specimen Collection & Preparation: The Halogen 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 testing.
Note: While bleach, bromine and other halogens are stable in solutions at or above pH 10.3, it is
unstable at pH’s found in normal urine specimens (pH 4.5 to pH 8.5) and rapidly oxidizes resulting in
reduced detectable concentrations of halogen(s).
All urines collected should be handled as potentially infectious.
Click here for Package Inserts and other Documentation for our Halogen Reagents.