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Sample Handling01:02

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Transportation of samples from the collection point to the laboratory, as well as storage and preservation techniques, are crucial for maintaining sample integrity and ensuring accurate and reliable test results.
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Doping control container for urine stabilization: a pilot study.

Maria Tsivou1, Evangelia Giannadaki1,2, Fiona Hooghe3

  • 1Doping Control Laboratory of Athens, Olympic Athletic Center of Athens, Maroussi, Greece.

Drug Testing and Analysis
|August 7, 2016
PubMed
Summary
This summary is machine-generated.

A new chemical stabilization mixture, applied via spray-coating in urine containers, effectively prevents microbial and enzymatic degradation of sports doping samples. This innovation enhances the reliability of anti-doping testing procedures.

Keywords:
doping controlmicroorganismsproteasesstabilizationurine degradation

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Area of Science:

  • Sports Science
  • Analytical Chemistry
  • Biochemistry

Background:

  • Urine collection containers lack protection against microbial and enzymatic degradation.
  • Degradation compromises the integrity of doping control samples.
  • Existing methods for sample preservation are insufficient.

Purpose of the Study:

  • To develop and evaluate an improved chemical stabilization mixture for urine samples.
  • To assess the efficacy of spray-coated stabilization in pilot urine collection containers.
  • To investigate potential interferences with analytical testing procedures.

Main Methods:

  • Development of a chemical mixture with antimicrobial agents and protease inhibitors.
  • Spray-coating the mixture onto the internal surface of plastic urine containers.
  • Incubation of urine samples in stabilized containers and testing by WADA-accredited laboratories.
  • Evaluation of microorganism elimination, steroid glucuronide stability, and protein/peptide degradation.
  • Analysis of potential interferences using routine screening methods.

Main Results:

  • The spray-coated stabilization mixture effectively eliminated microorganisms.
  • Degradation of steroid glucuronides and proteins (hCG, EPO, GHRPs) was prevented.
  • Stabilization efficiency was confirmed across multiple WADA-accredited laboratories.
  • Potential analytical interferences were identified and recorded.

Conclusions:

  • The spray-coated plastic urine container is a viable improvement for doping control procedures.
  • This method enhances the stability and reliability of urine samples.
  • Further research should focus on optimizing the mixture and application for routine use.