Quick Fix Synthetic reminds laboratory professionals and researchers that specimen temperature remains the most common reason for sample rejection, with industry data showing a sharp rise in validity failures.

LAS VEGAS, Jan. 5, 2026 /PRNewswire/ -- Quick Fix Synthetic, the official distributor of Spectrum Labs' Quick Fix products, today issued guidance for laboratory professionals regarding temperature-related specimen failures.

Federal regulations from SAMHSA and the Department of Transportation require urine samples to register between 90°F and 100°F (32°C to 38°C) within four minutes of collection. Samples falling outside this window are automatically flagged as invalid, triggering recollections, administrative delays, and added costs for facilities already operating under tight margins.

The problem is getting worse, not better. According to Quest Diagnostics' Drug Testing Index, which analyzed nearly 10 million workforce drug tests, invalid specimen rates climbed 45.2% compared to the previous year. Temperature screening serves as the first line of defense against compromised samples, yet the narrow acceptable range leaves little room for error. A few degrees' variance, brief transport delays, or a cold collection environment can push readings outside acceptable limits before anyone realizes something has gone wrong.

The drug testing industry continues to expand rapidly, amplifying the impact of these failures. Mordor Intelligence values the drug screening market at $8.49 billion in 2025, with projections reaching $18.12 billion by 2030. For laboratories handling this volume, consistent calibration materials have become essential. Synthetic urine products allow facilities to verify equipment accuracy and train staff on proper handling procedures without relying on unpredictable human samples or introducing biohazard concerns.

"Temperature is one of the most misunderstood aspects of specimen handling," said Chris Kennedy, Office Manager at Quick Fix Synthetic. "People assume it's straightforward, but samples lose heat far faster than most expect. A liquid at body temperature can drop below the acceptable range in minutes under typical room conditions. Proper temperature management requires attention across the entire handling chain, not just at the moment of collection."

The science behind the requirement is straightforward. Fresh human urine exits the body at approximately 98.6°F and begins cooling immediately upon exposure to ambient air. The 90°F to 100°F window accounts for normal biological variation while remaining narrow enough to flag samples that may have been mishandled or compromised. For calibration purposes, maintaining this temperature range ensures testing equipment performs accurately.

Quick Fix Synthetic encourages laboratory professionals to review proper storage and handling protocols to ensure accurate, dependable outcomes in calibration and research applications.

Learn more at: quickfixsynthetic.com

About Quick Fix Synthetic

Quick Fix Synthetic is the official distributor of Spectrum Labs' Quick Fix products. Dedicated to product integrity and customer education, the company provides synthetic urine solutions for calibration, research, and educational applications, alongside resources to help professionals understand testing standards and specimen handling.

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SOURCE Quick Fix Synthetic