In environmental and geochemical research, some of the most consequential actions are also the least visible. Long before results are published or policy decisions are informed, the integrity of our work is shaped by seemingly small laboratory practices—often overlooked, rarely celebrated, but absolutely essential.
One such practice is surface swiping, a standard procedure used to assess potential ¹⁴C (radiocarbon) contamination in laboratories preparing samples for Accelerator Mass Spectrometry (AMS). At first glance, it appears routine. In reality, it represents a foundational principle of environmental science: data integrity begins with contamination control.
Swipes are collected from laboratory surfaces routinely touched during sample preparation—benches, fume hoods, centrifuges, balances, pipettes, and even door handles. These are not arbitrary targets. They reflect an uncomfortable truth we all must acknowledge: contamination is most often introduced through human activity, not instrument failure.
This protocol mirrors what I’ve encountered repeatedly in both academic and applied environmental laboratories, where the difference between defensible data and questionable results often comes down to discipline, not instrumentation. This specific work was carried out collaboratively with Jema Caumanday, under the supervision of Dr. Edward Lo, Assistant Professor of Geology, School of Earth, Environment & Sustainability, Georgia Southern University, underscoring the importance of mentorship, oversight, and shared responsibility in maintaining laboratory integrity.
What makes this procedure especially instructive is its emphasis on behavioral rigor:
- Shared glassware is avoided due to the high risk of cross-contamination.
- Supplies are ordered directly from manufacturers rather than taken from common storerooms with unknown handling histories.
- Disposable gloves are changed between every swipe, without exception.
- A blank swipe is always collected first, establishing a baseline against which all results must be interpreted.
None of these steps are technologically advanced. Yet together, they form a system of accountability. The blank swipe, in particular, is a quiet but powerful safeguard, it forces us to confront background contamination honestly and prevents us from mistaking noise for signal.
From a broader perspective, this practice mirrors the realities of environmental fieldwork. Whether sampling groundwater near a legacy industrial site, assessing sediment contamination, or preparing samples for isotopic analysis, precision is inseparable from ethics. There is no meaningful distinction between “good technique” and “good science.”
In an era where environmental data increasingly informs regulatory decisions, remediation strategies, and community trust, the margin for error is small. The credibility of our conclusions depends not only on sophisticated analytical instruments, but on consistent, disciplined behavior, especially when no one is watching.
Voices from the Field takeaway
Environmental integrity is not established at publication. It is built in the lab, one glove change, one blank sample, and one careful decision at a time.
These are the practices I carry with me from the lab into the field and into every environmental project I touch.
— Oluwatunmise Akanmu
Environmental Scientist & Geologist
Voices from the Field — grounding environmental science in practice, ethics, and responsibility
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