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Rubber & Latex

Description of Industry

The complex chemistry associated with rubber and latex products may also include distinct off-odors and some contain sulfur.  VAC has the capability to detect and measure volatile compounds and their off-odors including those with strong sulfur smell.  Once the identity of an off-odor is known, processing steps or ingredients that led to its development/ introduction may be identified and mitigated.

 

Applicable Services

What we do

We are experts in odor analysis and trace level chemical detection and measurement.  Both odor analysis and chemical detection are utilized when we employ gas chromatography-mass spectrometry/ olfactometry.   We also employ expert experimental design, sample prep measures, and statistical analyses to ensure appropriate scientific rigor.

Odor Analysis GC-MS/O

Gas chromatography-mass spectrometry/olfactometry provides the very best technique to quickly resolve off-odor issues.  This method requires a trained odor judge to sniff GC effluent and rate odor character and intensity.  This information is coupled by retention time automatically via software to GCMS chromatogram data to allow for rapid odor identification.   Our sensory and analytical team have more than 20 years experience with odor, analytical, and organic chemistry, and sensory analysis.

Odor Baseline Establishment

Baseline GCMS/O measurements have proved extremely helpful to our clients because they establish the aroma and chemical profile of a product considered good.  When odor problems arise new GCMS/O analyses can rapidly determine what chemical changes occurred compared with a product considered good to allow for production process examination and off odor mitigation.

New Product Development Aroma Support

To ensure new products exhibit desired aroma character and intensity, we employ spot-on sensory assessment, extraction methods and analytical analysis.   Sensory includes quantitative descriptive analysis to ensure the attributes measured match those desired.  Extraction methods depend on the nature of the material.  Dynamic headspace extraction works for many products however specialized techniques such as sir bar sorptive extraction and solid phase microextraction also have a place.  Analytical may employ  GCMS, GCMS-MS,  GCMS/O, or other method appropriate to answer a specific question.

Odor Investigation

We utilize the most advanced scientific techniques and instruments currently available to detect and measure volatile chemicals responsible for odor.  We utilize gas chromatography-mass spectrometry/ olfactometry  to quickly determine what retention index values from a chromatogram correspond with odor.  This capability dramatically improves our capability to identify trace level chemicals responsible for off-odors.

Odor Complaint Mitigation

Our team has the capability to provide a rapid and accurate response to your odor problem. We employ the latest in scientific instrumentation plus our team has more than 20 years experience with odor chemistry and analytical measurement.

Related News, Case Studies, and Blog Posts

What is Off-Odor?

What is off-odor?  The true answer is you’ll know it when you smell it!  Doesn’t have to stink like dead fish or 2 week old ground beef left in the refrigerator, although those certainly are obnoxious.  Off-odor can be a nice fresh floral smell, like that of a rose, only the rose aroma originates from a batch of freshly roasted pecans.  The rose aroma doesn’t belong there.  It detracts from the richness of deep, warm, roasted pecan aroma. Many off-odor projects we tackle at Volatile Analysis involve issues akin to that of rose-pecan.  Aroma chemistry tells us one very common fragrant molecule that has an aroma similar to rose is...

Statistics of Sensory Assessment: Cohen’s Kappa

Statistics of Sensory Using people as diagnostic sensors produces more variation than instrumental methods. There are situations where the benefits of human-based measures outweigh their inconsistency. This is particularly true for aromas and flavors. Choosing, training and aligning panelists is a big investment. If sensory activities are key to your business success, you need to know how well your system is performing. Evaluating sensory judge quality can be challenging. Between-judge agreement appears simple, yet it is critical to success. Cohen's Kappa One approach to evaluating agreement involves Cohen’s Kappa. For example, the judges measure a set of standards for intensity, using four levels. The collected impressions are then compared. A Kappa table looks like...