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Cocaine Test Strip
A rapid, one step test for the qualitative detection of Cocaine Metabolite in human urine.
For healthcare professionals including professionals at point of care sites.
For in vitro diagnostic use only.
The COC One Step Cocaine Test Strip is a rapid chromatographic immunoassay for the qualitative detection of cocaine metabolite, Benzoylecgonine, in human urine at a cut-off concentration of 300 ng/mL.
This assay provides only a preliminary analytical test result. A more specific alternate chemical method must be used in order to obtain a confirmed analytical result. Gas chromatography/mass spectrometry (GC/MS) is the preferred confirmatory method. Clinical consideration and professional judgment should be applied to any drug of abuse test result, particularly when preliminary positive results are used.
Cocaine is a potent central nervous system (CNS) stimulant and a local anesthetic. Initially, it brings about extreme energy and restlessness while gradually resulting in tremors, over-sensitivity and spasms. In large amounts, cocaine causes fever, unresponsiveness, and difficulty in breathing and unconsciousness.
Cocaine is often self-administered by nasal inhalation, intravenous injection and free-base smoking. It is excreted in the urine in a short time primarily as Benzoylecgonine 1, 2. Benzoylecgonine, a major metabolite of cocaine, has a longer biological half-life (5 - 8 hours) than cocaine (0.5 - 1.5 hours), and can generally be detected for 24-48 hours after cocaine exposure.2
The COC One Step Cocaine Test Strip is a rapid urine screening test that can be performed without the use of an instrument. The test utilizes a monoclonal antibody to selectively detect elevated levels of cocaine metabolite in urine. The COC One Step Cocaine Test Strip yields a positive result when the cocaine metabolite in urine exceeds 300 ng/mL. This is the suggested screening cut-off for positive specimens set by the Substance Abuse and Mental Health Services Administration (SAMHSA, USA).
The COC One Step Cocaine Test Strip is an immunoassay based on the principle of competitive binding. Drugs which may be present in the urine specimen compete against the drug conjugate for binding sites on the antibody.
During testing, a urine specimen migrates upward by capillary action. Benzoylecgonine, if present in the urine specimen below 300 ng/mL, will not saturate the binding sites of antibody in the test strip. The antibody coated particles will then be captured by immobilized Benzoylecgonine conjugate and a visible colored line will appear in the test line region. The colored line will not form in the test line region if the Benzoylecgonine level exceeds 300 ng/mL because it will saturate all the binding sites of anti-Benzoylecgonine antibody.
A drug-positive urine specimen will not generate a colored line in the test line region because of drug competition, while a drug-negative urine specimen or a specimen containing a drug concentration less than the cut-off will generate a line in the test line region.
To serve as a procedural control, a colored line will always appear at the control line region, indicating that proper volume of specimen has been added and membrane wicking has occurred.
The test strip contains monoclonal anti-Benzoylecgonine antibody-coupled particles and Benzoylecgonine-protein conjugate. A goat antibody is employed in the control line system.
STORAGE AND STABILITY
Store as packaged in the sealed pouch at 2-30°C. The test strip is stable through the expiration date printed on the sealed pouch. The test strips must remain in the sealed pouch until use. DO NOT FREEZE. Do not use beyond the expiration date.
SPECIMEN COLLECTION AND PREPARATION
The urine specimen must be collected in a clean and dry container. Urine collected at any time of the day may be used. Urine specimens exhibiting visible precipitates should be centrifuged, filtered, or allowed to settle to obtain a clear specimen for testing.
Urine specimens may be stored at 2-8ºC for up to 48 hours prior to testing. For prolonged storage, specimens may be frozen and stored below -20ºC. Frozen specimens should be thawed and mixed before testing.
Materials Required But Not Provided
DIRECTIONS FOR USE
Allow the test strip, urine specimen, and/or controls to equilibrate to room temperature (15-30ºC) prior to testing.
INTERPRETATION OF RESULTS
NEGATIVE:* Two lines appear. One colored line should be in the control region (C), and another colored line should be in the test region (T). This negative result indicates that the Benzoylecgonine concentration is below the detectable level (300 ng/mL).
* NOTE: The shade of the color in the test region (T) may vary, but it should be considered negative whenever there is even a faint line.
POSITIVE: One colored line appears in the control region (C). No line appears in the test region. This positive result indicates that the Benzoylecgonine concentration is above the detectable level (300 ng/mL).
INVALID: Control line fails to appear. Insufficient specimen volume or incorrect procedural techniques are the most likely reasons for control line failure. Review the procedure and repeat the test with a new test strip. If the problem persists, discontinue using the test kit immediately and contact your local distributor.
A procedural control is included in the test. A colored line appearing in the control region (C) is considered as an internal procedural control. It confirms sufficient specimen volume, adequate membrane wicking and correct procedural technique.
Control standards are not supplied with this kit; however, it is recommended that positive and negative controls be tested as a good laboratory testing practice to confirm the test procedure and to verify proper test performance.
A side-by-side comparison was conducted by laboratory personnel using the COC One Step Cocaine Test Strip and a commercially available rapid test. Testing was performed on specimens previously collected from subjects presenting for Drug Screen Testing. Presumptive positive results were confirmed by GC/MS. The following results were tabulated:
|Method||Other COC Rapid Test||Total Results|
|COC One Step Test Strip||Results||Positive||Negative|
|% Agreement with this commercial kit||95%||>99%||98%|
When compared to GC/MS at the cut-off of 300 ng/mL, the following results were tabulated:
|COC One Step Test Strip||Results||Positive||Negative|
|% Agreement with GC/MS Analysis||96%||90%||93%|
Eighty (80) of these clinical samples were also run using the COC One Step Cocaine Test Strip by an untrained operator at a different site. Based on GC/MS data, the operator obtained a statistically similar Positive Agreement, Negative Agreement and Overall Agreement rate as the laboratory personnel.
A drug-free urine pool was spiked with Benzoylecgonine at the following concentrations: 0 ng/mL, 150 ng/mL, 225 ng/mL, 300 ng/mL, 375 ng/mL and 450 ng/mL. The result demonstrates >99% accuracy at 50% above and 50% below the cut-off concentration. The data are summarized below:
|Benzoylecgonine Concentration (ng/mL)||Percent of Cutoff||n||Visual Result|
The following table lists compounds that are positively detected in urine by the COC One Step Cocaine Test Strip at 5 minutes.
A study was conducted at three physician’s offices by untrained operators using three different lots of product to demonstrate the within run, between run and between operator precision. An identical panel of coded specimens were blind labeled and tested at each site. The results are given below:
|n||Site 1||Site 2||Site 3|
*Note: Non-valid results were obtained in this treatment. Non-valid tests were provided as part of this study to ensure that readers would accurately identify non-valid test results.
Effect of Urinary Specific Gravity
Fifteen (15) urine samples of normal, high, and low specific gravity ranges were spiked with 150 ng/mL and 450 ng/mL of Benzoylecgonine respectively. The COC One Step Cocaine Test Strip was tested in duplicate using the fifteen neat and spiked urine samples. The results demonstrate that varying ranges of urinary specific gravity does not affect the test results.
Effect of the Urinary pH
The pH of an aliquoted negative urine pool was adjusted to a pH range of 5 to 9 in 1 pH unit increments and spiked with Benzoylecgonine to 150 ng/mL and 450 ng/mL. The spiked, pH-adjusted urine was tested with the COC One Step Cocaine Test Strip in duplicate and interpreted according to the package insert. The results demonstrate that varying ranges of pH does not interfere with the performance of the test.
A study was conducted to determine the cross-reactivity of the test with compounds in either drug-negative urine or Benzoylecgonine positive urine. The following compounds show no interference when tested with the COC One Step Cocaine Test Strip at a concentration of 100 mg/mL.
Non Cross-Reacting Compounds
|Benzoic acid||(±) - Isoproterenol||Promazine|
|Chlorpromazine||(±) -3,4-Methylenedioxy-amphetamine hydrochloride||Sulindac|
|Cholesterol||(±) -3,4-Methylenedioxymeth-amphetamine hydrochloride||Tetracycline|
|Codeine||Tetrahydrocortisone 3-(b-D glucuronide)|
|(-) Cotinine||Nalidixic acid||Tetrahydrozoline|
|(-) - Ψ-Ephedrine||Oxalic acid||DL-Tryptophan|
|b-Estradiol||Oxolinic acid||Uric acid|
Printed in China
Eff. Date: 2005-03-10
Span Biotech Ltd. is a research based company for rapid tests, with strong support from National Key Laboratory of Technology Projects of 10th and 11th Five-Year Plan and Faculty of Life Sciences of HuBei University. SpanBio also housed a R&D team that is developing gene recombination, cell cultivation and protein purification techniques. SpanBio pays strict attention on rapid tests for human being, animal diseases and food safety detection. It provides a number of customized services to professional distributors and partnering affiliates with excellent quality, competitive prices and super service.
Contact Person: Ms. Anna Lee