What is laboratory automation and how does it work?

Laboratory automation has reshaped how analytical laboratories operate, particularly in fields where sample volumes are high, contamination risks are real, and regulatory requirements are strict. Whether a lab is screening food products for dioxins, testing water for PFAS, or monitoring soil for persistent organic pollutants, manual sample preparation is increasingly becoming the bottleneck. Automated systems address that bottleneck directly, replacing repetitive, error-prone manual steps with precise, programmable workflows that deliver consistent results at scale.

Understanding what laboratory automation actually involves, and how it works in practice, helps laboratories make better decisions about when and where to invest. This article walks through the core components, the step-by-step workflow, and the practical considerations that matter most when evaluating a laboratory automation solution.

The core components of a laboratory automation system

A laboratory automation system is not a single piece of equipment but a coordinated set of modules, each handling a distinct phase of sample processing. The specific components vary depending on the application, but most systems share a common architecture built around extraction, purification, concentration, and data capture.

Extraction modules

Extraction is where target compounds are isolated from the sample matrix. In environmental and food testing, this often involves solid-liquid extraction or Solid Phase Extraction (SPE). Automated SPE platforms can process dozens of samples in a single run, applying controlled flow rates and solvent volumes that manual techniques struggle to replicate consistently. For solid and semi-solid matrices such as soil or feed, solvent-based extraction systems use heat and controlled solvent cycling to maximize recovery while minimizing solvent use.

Purification and cleanup systems

After extraction, samples typically contain co-extracted matrix components, including lipids, sulfur compounds, or other interferences, that must be removed before analysis. Automated cleanup systems handle this step using multi-layer column chromatography or other selective retention mechanisms. The key advantage of automation here is reproducibility: every sample passes through the same sequence of steps under the same conditions, eliminating the variability introduced by different analysts or varying working conditions.

Concentration and evaporation units

Many analytical methods require samples to be concentrated to a precise final volume before injection into a GC or LC system. Automated evaporation systems, including vacuum centrifuges and parallel nitrogen blowdown units, handle this step efficiently across large batches. Some systems can process more than 60 samples simultaneously, dramatically reducing the time between extraction and analysis.

Software and control interfaces

Tying these modules together is a software layer that sequences operations, tracks samples, and logs instrument parameters. Modern systems offer intuitive interfaces that allow operators to configure methods, set volume targets, and monitor progress without specialist programming knowledge. This integration is what transforms a collection of instruments into a true automated workflow.

How laboratory automation works step by step

The workflow in an automated sample preparation system follows a logical sequence that mirrors manual procedures but executes each step with greater precision and without constant operator intervention.

The process typically begins with sample loading. Samples in their raw form, whether food homogenate, water, soil, or air filter extract, are placed into the system’s sample racks or vessels. From this point, the system takes over. Extraction proceeds according to a pre-programmed method, applying the correct solvent, volume, and contact time for the matrix and target analytes in question.

Once extraction is complete, the extract is transferred automatically to the cleanup module. Here, selective column chromatography separates the target compounds from matrix interferences. In systems designed for persistent organic pollutant analysis, this stage may involve multiple sequential columns with different selectivities, all handled without manual transfer between steps. Because samples do not come into direct contact with the instrument housing, cross-contamination between runs is effectively eliminated.

The purified extract then moves to the concentration stage, where excess solvent is removed under controlled conditions to reach the target volume. Finally, the concentrated extract is ready for instrumental analysis, typically by high-resolution mass spectrometry or gas chromatography. Throughout the entire sequence, the system logs instrument parameters and sample identifiers, providing a complete audit trail for regulatory compliance and quality assurance purposes.

Key application areas in environmental and food testing

Laboratory automation delivers the greatest value in testing environments where sample throughput is high, analytical requirements are stringent, and the consequences of errors are significant. Environmental and food safety laboratories meet all three criteria.

Persistent organic pollutants

The analysis of dioxins, PCBs, PBDEs, and PCNs in food, feed, soil, and biological matrices is one of the most demanding areas of environmental chemistry. These compounds occur at trace levels in complex matrices, requiring extensive cleanup before mass spectrometry analysis. Automated purification systems designed specifically for this application can handle diverse matrices, from eggs and fish oil to sewage sludge and air filters, within a single platform. Validated automated methods for PBDE analysis automation have demonstrated recovery rates and precision equivalent to, or better than, manual procedures, while significantly increasing throughput.

PFAS analysis in water and environmental matrices

Per- and polyfluoroalkyl substances present unique analytical challenges due to their ubiquity in the environment and their tendency to appear as background contamination in laboratory materials. PFAS SPE automation addresses this challenge through fully inert flow paths that eliminate PFAS contributions from the instrument itself. Automated large-volume water extraction systems can process samples of up to several liters, concentrating trace-level PFAS compounds efficiently and reproducibly. This is particularly relevant as regulatory limits for PFAS in drinking water continue to tighten across Europe and North America.

Pesticides, hormones, and emerging contaminants

Beyond the well-established POPs and PFAS categories, automated SPE platforms are increasingly applied to pesticide residue analysis, hormone monitoring, and the detection of emerging contaminants such as PAHs and SVOCs. The flexibility to work with different cartridge formats and sample volumes makes modern automated extraction systems adaptable across a broad range of regulatory monitoring programs.

Automation vs. manual sample preparation: a practical comparison

The case for automation is often made in terms of throughput, but the practical differences between automated and manual sample preparation extend well beyond speed.

Manual sample preparation is inherently variable. Different analysts apply slightly different pressures, timings, and volumes at each step. Over a large batch, this variability accumulates and can introduce measurable differences in recovery and precision. Automated systems execute every step identically, regardless of which operator loaded the samples or how many hours into a shift the system is running. This consistency directly improves data quality and reduces the frequency of repeat analyses caused by out-of-specification results.

Solvent consumption is another meaningful difference. Manual extraction methods often require several hundred milliliters of organic solvent per sample, including chlorinated solvents such as dichloromethane that carry significant health and disposal costs. Well-designed automated systems can reduce solvent consumption to less than 100 ml per sample and eliminate the need for the most hazardous solvents entirely. Across a laboratory processing hundreds of samples per month, this represents a substantial reduction in reagent costs, waste disposal costs, and occupational exposure risk.

Analyst time is also redistributed rather than eliminated. Automation does not remove the need for skilled scientists; it shifts their time from repetitive pipetting and column packing toward method development, data review, and interpretation. This is a more productive use of specialist expertise and tends to improve job satisfaction as well as output quality.

What to consider when choosing a lab automation solution

Selecting the right automated system requires matching the platform’s capabilities to the laboratory’s specific workload, regulatory context, and long-term goals. Several factors deserve careful evaluation before committing to a particular solution.

Matrix compatibility is a fundamental starting point. A system optimized for water samples may not handle solid matrices such as soil or food homogenates without significant method development. Laboratories working across multiple matrix types benefit from platforms designed with flexibility built in, including interchangeable components and validated methods for diverse sample types.

Throughput requirements should be assessed realistically. A system capable of processing 80 samples per run offers clear advantages for high-volume routine monitoring, but a smaller laboratory with variable sample loads may find that a more modular, lower-capacity system better matches its actual workflow. Overcapacity is a real risk: instruments that sit idle represent capital tied up unproductively.

Regulatory compliance is non-negotiable in accredited laboratories. Systems should be configurable in line with relevant EPA, CEN, or ISO methods, and the manufacturer or supplier should be able to provide validated method documentation. Pre-installation programming and application testing by the supplier significantly reduce the time required to achieve accredited status after installation.

Solvent compatibility and materials matter particularly for PFAS applications, where any Teflon components in the flow path can introduce background contamination. Fully inert systems designed specifically for PFAS and endocrine disruptor analysis offer a meaningful advantage in this context.

Ongoing support and training should be factored into the total cost of ownership. A technically sophisticated system delivers its full value only when operators are well trained and responsive technical support is available when issues arise. Suppliers who offer method development assistance, training courses, and long-term technical partnerships provide substantially more value than those who deliver equipment and move on.

How DSP-Systems helps with laboratory automation

DSP-Systems is a specialized laboratory automation supplier serving laboratories across Europe and North America, with a portfolio specifically designed for the analysis of environmental contaminants and persistent organic pollutants. Their offering covers the full sample preparation workflow, from extraction through purification to concentration, with systems validated for demanding regulatory applications.

The GO-EHT fully automated purification system handles dioxins, PCBs, PBDEs, and PCNs across food, feed, soil, water, and air matrices, using less than 100 ml of solvent per sample and eliminating cross-contamination risk
The SPE2000 processes up to 80 samples per run and supports PFAS, pesticides, hormones, PAHs, and other emerging contaminants across a wide range of cartridge and volume formats
The AutoEmpore delivers high-throughput large-volume water extraction with automatic online filtration, ideal for PFAS and pesticide monitoring programs
The SER-158 provides automated solvent extraction for solid and semi-solid samples, fully compatible with GO-EHT cleanup systems for an integrated end-to-end workflow
Concentration solutions including the MultiVap 64 and CentriVap complete the workflow, handling batch evaporation with precision and safety
All systems are supported by pre-installation programming, application testing, method validation assistance, and ongoing technical support

Whether a laboratory is looking to automate a single step or build a fully integrated sample preparation line, DSP-Systems provides the expertise and equipment to make it work. Get in touch with the DSP-Systems team to discuss your specific application and find the right automation solution for your laboratory.