Automated Reagent Dispensing
Accurate, reproducible liquid handling for assay development and screening
High-throughput screening depends on more than sensitive detection. Reagents must be dispensed accurately and consistently across hundreds or thousands of wells, often using very small volumes. Variability in liquid handling can compromise assay quality, reduce reproducibility, and obscure genuine differences in biological activity.
The Fisher Drug Discovery Resource Center provides automated liquid-handling and dispensing technologies to support assay development, plate preparation, miniaturization, and high-throughput screening. These systems help make experimental workflows more consistent, scalable, and compatible with automated screening.
Why Automated Dispensing Matters
Reducing assay volumes can substantially lower reagent consumption and screening costs, but miniaturization also places greater demands on liquid handling. Dispensing performance, reagent properties, plate format, and assay design must all be considered together.
Automated dispensing can support:
- Assay miniaturization: reducing reaction volumes while maintaining reliable assay performance.
- Plate preparation: dispensing reagents into multiwell plates with consistent volumes and layouts.
- High-throughput screening: preparing large numbers of assay wells reproducibly.
- Reagent distribution: dispensing common assay components from bulk reagent sources.
- Workflow consistency: reducing manual handling and well-to-well variability.
- Screening efficiency: supporting the preparation and processing of large compound and assay plates.
Our Dispensing Technologies
Different dispensing systems are suited to different liquids, volumes, plate formats, and workflows. The DDRC uses complementary technologies to support a range of assay preparation and screening requirements.
Bulk Reagent Dispensing
Automated dispensing systems support the rapid and consistent addition of assay reagents to multiwell plates. They are particularly useful when a common reagent must be delivered across many wells or plates as part of a standardized assay workflow.
Automated plate dispensing supports reproducible reagent addition for multiwell assays and screening workflows, helping reduce manual handling and improve consistency across plates.
Automated Liquid Handling and Plate Preparation
Automated liquid handling supports plate preparation and more complex liquid-transfer workflows. Depending on the application, these systems can help prepare assay plates, transfer samples, and organize liquid-handling steps for screening and follow-up experiments.
Dispensing as Part of Assay Development
Automated dispensing is not simply a way to make an existing procedure faster. It can influence how an assay is designed and whether that assay can be translated successfully into a high-throughput format.
During assay development, we consider reagent volumes, dispensing precision, plate compatibility, mixing requirements, reagent stability, and the effects of miniaturization on assay performance. The objective is to develop a workflow that is not only automated, but also robust and reproducible.
For large screening campaigns, reagent consumption is another important consideration. Optimizing dispensing volumes and sourcing appropriate reagents can significantly reduce costs when an assay must be performed across hundreds of thousands of wells.
Integration with Screening and Detection
Dispensing technologies work in concert with the DDRC’s analytical instruments and screening infrastructure. Automated reagent delivery can be combined with microplate detection, compound addition, incubation, and data analysis to create a complete screening workflow.
The appropriate combination depends on the assay. A simple biochemical assay may require only consistent reagent dispensing and plate-reader detection, while a more complex cellular assay may require additional steps, specialized plate handling, or carefully controlled incubation conditions.
DDRC Perspective
Reliable liquid handling is fundamental to reliable screening data. An assay that performs well by hand may behave differently when miniaturized or transferred to an automated workflow.
Our approach is to consider dispensing as part of the overall assay design—from the choice of reagents and reaction volumes to plate format, automation, detection, and quality control.
The goal is not simply to dispense liquids automatically, but to build reproducible experimental workflows that generate dependable data.