Case Study: Foreign Material on Produce

Produce refers to the fresh fruits and vegetables that are grown on farms. These items are typically sold in supermarkets, grocery stores, and farmers markets. Foreign material on produce can refer to a buildup of small particles, such as dirt or pollution, that settle on fruits and vegetables before they are harvested or packaged. The material can come from a variety of sources, including the natural environment, nearby construction, industrial sites, or even from the transportation process. While the foreign material may not pose a significant health risk, it can impact the appearance and texture of the produce, making it less appealing to consumers.

THE PROBLEM:

A large wholesaler of fruit and vegetables discovered that the quality of their products and processing operations had been suddenly affected by a dusty foreign material on their produce. They suspected it was dust from a remodeling project at a neighboring business.

THE ANALYSES:

Using stereomicroscopy, MVA Scientific Consultants analyzed dust samples from several locations in the facility, all of which appeared to be the same. Polarized light microscopy (PLM) and scanning electron microscopy-energy dispersive x-ray spectrometry (SEM-EDS) revealed that the dust samples contained paper fibers, starch, fiberglass and cement particles. Trace amounts of soil-derived minerals, rust, iron shavings, copper and lead chromate-pigmented paint fragments were also observed. The presence of soil-derived minerals was attributed to background dust.

THE OUTCOME:

Starch was identified as present from the food processing operations. The paper fibers that were found were likely from recycling and paper handling operations (such as wrapping, boxing, etc.), which were located next door. Much of the dust (i.e. cement, fiberglass, iron rust, paint, etc.) was the result of construction activities, and were likely originated from a new construction site located nearby.

If your company or facility is dealing with unknown foreign material that compromises the quality of your products, please contact us at info@mvainc.com or 770-662-8509.