How to Limit Waste While Pipetting

The increased urgency around plastic use awareness is nothing novel, and yet the crisis continues to loom large. According to the World Wildlife Fund report, an estimated 10 million metric tons of plastic waste enter the ocean each year, harming marine life and ecosystems. As we know, plastic waste can take hundreds of years to decompose, contributing to alarming long-term environmental damage.  

Concurrently, laboratory plastic consumption has reached concerning levels, with 5 million tons generated annually worldwide (or 67 cruise liners worth, as visualized by the Nature Report in 2015). While the immediate impact may be evident at the bench level, comprehending the broader environmental consequences requires awareness and education. 

A simple yet eye-opening experiment can effectively illustrate the issue: instead of observing daily disposals, try saving your lab's plastic waste for a week. The accumulated volume in just a few days will be a powerful wake-up call, a stark reminder of our collective contribution. By transforming the invisible into a visible tangible mass, we gain a deeper understanding of our plight and the urgency toward finding ecological solutions.  

Now that we have confirmed the severity of the problem, we need to understand exactly what gets tossed. Different research areas will have distinct plastic waste profiles. For instance, cell culture labs will have stacks of tissue culture dishes and flasks, while genomics laboratories might pile on significant amounts of PCR tubes and plates.

Thorough planning and preparation form the foundation for conducting cost-effective and resource-efficient research. Developing a holistic experiment is instrumental in achieving a balance between minimizing wasteful repetitions and maximizing the data generated. This translates to cost savings and a reduction in surpluses of material waste.

• Excess
  • During the strategy development phase, it is crucial to quantify consumable requirements. This entails estimating the exact amount of materials required and placing orders that account for potential contingencies, while avoiding excessive stockpiling that can lead to waste. Collaboration and resource sharing with other laboratories can also be explored to utilize existing supplies that might otherwise be discarded. While bulk ordering can be a fiscally responsible and environmentally conscious strategy, it's imperative to consider storage limitations and expiration dates to prevent unnecessary waste from outdated or spoiled resources.

• Faulty pipetting
  • Inaccurate pipetting techniques extend beyond the generation of discarded plastic pipette tips and pose a significant threat to both research efficiency and resource management. Errors such as inconsistent pipetting volumes, environmental or temperature fluctuations, and neglecting routine calibration can trigger a domino effect, leading to wasted resources, lost time, and compromised data integrity.

Over-pipetting a precious enzyme solution or under-pipetting a critical buffer can render an entire experiment unusable. The opposite scenario – extracting too little sample material or adding too much – can also necessitate repeating the experiment. Both situations result in a waste of valuable resources and delay research progress, impacting project timelines and overall lab productivity.

Perhaps the most concerning consequence of faulty liquid quid handling lies in its potential to jeopardize data integrity. Experiments compromised by inaccurate pipetting can yield unreliable findings, casting doubt on the validity of subsequent research results. In the worst-case scenario, studies with flawed pipetting data may need to be retracted, a major setback for a research group and a blow to scientific credibility.