The purpose of fit testing for respirators is to ensure the respirator seals properly; two common methods are qualitative saccharin and quantitative portacount. Which option best describes this?

• A. To measure the filtration efficiency of the air
• B. To ensure the respirator seals properly; qualitative saccharin and quantitative portacount are two common methods
• C. To test the respirator's battery life
• D. To assess the color and style of the respirator

Answer: (B)

The main idea here is how fit testing ensures the respirator actually seals against the face so that contaminated air cannot leak around the edges. Two common methods—qualitative saccharin and quantitative portacount—are used to assess that seal, not to judge how well the filter material itself works.

Qualitative saccharin testing is a taste-based check. A sweet-tasting aerosol is released around the face while the wearer performs typical movements and tasks. If the wearer can taste sweetness, there’s a leak in the seal, indicating the fit isn’t proper. This method is subjective but quick and useful for screening.

Quantitative portacount testing is more objective. It uses instruments to compare the concentration of particles outside the respirator to the concentration inside while the wearer performs movements. The resulting fit factor gives a numerical measure of how well the seal holds up. This method provides a precise assessment of fit.

Filtration efficiency, battery life, or appearance are not what fit testing evaluates. The purpose is specifically to confirm the respirator’s seal is adequate so air leaks don’t bypass the filter.