July 6th, 2011,

We are seeing a rise in the use of “purple mold tests” by aggressive contractors.  These are kits similar to swimming pool test strips that turn color when used.  Some contractors are using this as definitive proof that mold is present in the area sampled when a kit turns purple.  The most common kit used is the Sporocidin Microbial Test Kit.  The manufacturer states:

“The Sporicidin Microbial Test Kit device is only a screening tool that cannot and should not be used as a definitive measure of protein containing mold, allergens, or bio-contamination.”

Use of these kits can give the contractor the appearance of having scientific data to back up the claim of contamination, which in turn can add thousands to the original estimate.  This practice has become especially prevalent in the duct cleaning industry.

True mold sampling requires surface samples and air samples be submitted for laboratory analysis.  One TV investigative report followed up the “purple tube test” with actual mold sampling.  While the “purple tube test” was “positive”, actual laboratory analysis showed no growth in the same area. It is important to make sure that mold testing, if elected to be done, is done to standards that reflect actual scientific analysis.

The American Council for Accredited Certification (ACAC) becomes the premier indepenent certifying body. The ACAC develops and maintains independent, third-party accredited certification programs for professionals. ACAC certifications attest to verified knowledge, field experience and continuing professional development.