Introduction
ELISA is one of the most widely used methods for protein quantification, with a long history in both research and bioprocessing.
At the same time, newer platforms such as Amperia™ are emerging, applying similar affinity-based assay principles but with different approaches to workflow and signal detection.
Rather than replacing ELISA, these approaches are often used to address different needs within the same workflow. Understanding how they compare helps in selecting the right method for each stage of development.
What Do ELISA and Amperia™ Have in Common?
At a fundamental level, both approaches are based on similar principles:
- Affinity-based detection
→ target proteins are captured using antibodies or binding reagents - Plate-based assay formats
→ samples are processed in a structured layout - End-point measurement
→ signal is measured after incubation steps
Because of this, both methods are capable of delivering quantitative protein measurements across a wide range of applications.
Key Differences in Practice
While the underlying assay concept is similar, the main differences lie in how the assay is executed and how the signal is measured.
Detection Method
- ELISA
→ optical readout (absorbance, fluorescence, or luminescence) - Amperia™
→ electrochemical readout (electrical signal generated from an enzymatic reaction)
Optical methods can be affected by sample background or turbidity, whereas electrochemical detection is generally less influenced by optical interference.
Workflow and Setup
- ELISA
→ typically involves multiple manual steps (coating, blocking, washing, incubation)
→ often run in batches - Amperia™
→ samples and reagents are loaded manually
→ subsequent assay steps, including incubation and measurement, are handled within a guided system workflow
This can help reduce manual intervention during the assay itself, while still requiring standard sample preparation.
Working with Complex Samples
- ELISA
→ may require optimisation when working with crude or complex samples - Amperia™
→ designed to support measurement in more complex matrices
This becomes particularly relevant in workflows involving crude lysates, cell culture media, or process intermediates, where sample composition can influence assay performance.
Consistency and Reproducibility
- ELISA
→ can be affected by manual handling and timing differences - Amperia™
→ guided workflow helps reduce variability between runs
This can make Amperia™ useful where consistent assay execution and comparable results are important across users, runs, or process conditions.
Conclusion
ELISA remains a powerful and widely used method for protein quantification, particularly in structured and validated workflows.
At the same time, platforms such as Amperia™ offer an alternative implementation of similar assay principles, with a focus on workflow efficiency and measurement in complex samples.
Selecting the right approach depends not only on analytical performance, but also on how well the method fits into the workflow.
References
- Lequin, R.M. (2005). Enzyme immunoassay (EIA)/enzyme-linked immunosorbent assay (ELISA). Clinical Chemistry
- Andreasson, U. et al. (2015). A practical guide to immunoassay method validation. Frontiers in Neurology.
Frequently asked questions
When should I use ELISA instead of Amperia™?
ELISA is widely used in structured and validated workflows, particularly where established protocols and regulatory familiarity are important. It is well suited to batch processing and high-sensitivity applications.
When is Amperia™ more suitable?
Amperia™ is often used in workflows where speed, consistency, and flexibility are priorities, particularly when working with complex matrices.
Can both methods be used in the same workflow?
Yes. In many labs, ELISA and alternative platforms are used together—ELISA for validated or large-scale measurements, and other approaches for faster iteration or early-stage decision-making.