Related Experiment Videos
Comparative Statistical Study of the Cornwall, LKB, and Micromedic Dispensers
J M Barbaree1, J A Habas, P H Rossing
1Center for Disease Control, Atlanta, Georgia 30333.
Applied and Environmental Microbiology
|November 1, 1977
Summary
The LKB 2075 dispenser demonstrated superior precision and ease of use compared to the Micromedic 25000 and Cornwall dispensers when pipetting viscous solutions. This study highlights significant differences in liquid handling device accuracy.
Area of Science:
- Biomedical Engineering
- Laboratory Science
Background:
- Accurate liquid handling is crucial in laboratory settings.
- Different pipetting devices (dispensers) vary in precision and usability.
- Evaluating dispenser performance is essential for reliable experimental results.
Purpose of the Study:
- To compare the working precisions of Cornwall, LKB 2075, and Micromedic 25000 dispensers.
- To contrast the bias between the LKB and Micromedic dispensers.
- To assess the ease of use for the LKB and Micromedic dispensers.
Main Methods:
- Three technologists performed pipetting tasks using multiple units of each dispenser type.
- Sucrose solution with serum-like viscosity was dispensed in 1.0-ml volumes.
- Precision and bias were quantified for each dispenser model and pump configuration.
Main Results:
- The LKB 2075 dispenser was approximately 30% more precise than the Micromedic 25000 dispenser.
- The Micromedic 25000 dispenser was approximately four times more precise than the Cornwall dispenser.
- Despite a slightly more precise left pump site, the Micromedic 25000 was overall less precise than the LKB 2075 and harder to use.
Conclusions:
- The LKB 2075 offers superior precision and usability for handling viscous liquids compared to the Micromedic 25000 and Cornwall dispensers.
- Significant variations in performance exist among different liquid handling devices.
- Selection of appropriate pipetting equipment is critical for accurate laboratory workflows.