What types of samples can automated preparation systems handle?

Automated sample preparation has transformed how laboratories approach contaminant analysis, but one question comes up consistently: which sample types can these systems actually handle? The answer is broader than many expect. Modern laboratory automation platforms are engineered to process an impressive range of matrices, from solid soils and food products to liquid water samples and even air, making them genuinely versatile tools for environmental and food safety laboratories working across multiple analytical programs.

Understanding which matrices a system can handle matters because sample type directly influences every downstream step, from extraction method to cleanup strategy to final concentration. Getting this right is not just a matter of convenience; it determines whether results are reliable, reproducible, and compliant with regulatory standards. The sections below walk through the full matrix landscape and explain how contaminant class, sample complexity, and practical workflow demands all shape the choice of automated approach.

Solid, liquid, and gas: the full matrix range covered

Automated sample preparation systems are designed to work across three fundamental physical states of matter, and each presents its own set of challenges. Solid matrices include food products, animal feed, soil, sewage sludge, and biological tissue. These samples typically require solvent-based extraction before any purification or cleanup step can begin. Liquid matrices span drinking water, surface water, wastewater, and leachates, where the primary challenge is often large sample volumes and trace-level target concentrations. Gaseous or airborne matrices, collected on adsorbent filters or trapping media, round out the range.

For solid and semi-solid samples, extraction systems such as the SER-158 use the Randall principle to perform extraction directly in boiling solvent, followed by a hot Soxhlet or Twisselmann step for maximum analyte recovery. Up to six samples can be extracted in a single run using less than 100 mL of solvent per sample, and solvents are simultaneously recovered, keeping both waste and operator exposure to a minimum. The extract is then ready for automated cleanup on a system such as the GO-EHT.

For liquid matrices, large-volume solid phase extraction is the standard approach. Systems like the AutoEmpore are built for exactly this purpose, supporting 25 mm, 47 mm, and 90 mm extraction disks as well as 3 mL and 6 mL cartridges, with automatic online filtration and water removal integrated into the workflow. This makes it straightforward to process high volumes of water samples without manual intervention between steps.

How contaminant class shapes sample handling requirements

The target analyte class is just as important as the physical state of the sample when selecting an automated preparation approach. Different contaminant groups behave differently during extraction and cleanup, which is why laboratory automation platforms need to be configurable rather than one-size-fits-all.

Persistent organic pollutants such as dioxins (PCDD/Fs), PCBs, and PBDEs are highly lipophilic compounds that co-extract with fats and oils from biological and food matrices. Removing these co-extracted lipids before mass spectrometry measurement is a critical step that requires carefully sequenced cleanup using multiple sorbent layers. The GO-EHT systems from Miura are specifically engineered for this task, purifying samples for PBDE analysis automation and dioxin/PCB workflows across food, feed, soil, and environmental matrices without the need for dichloromethane.

PFAS compounds present a different challenge entirely. These substances are highly water-soluble and occur at very low concentrations in environmental matrices, which demands extraction systems with inert flow paths free of Teflon to prevent background contamination from the equipment itself. PFAS SPE automation requires materials compatibility throughout the entire sample pathway, from tubing and valves to collection vessels. LabTech’s SPE systems address this directly with fully inert flow paths resistant to all organic solvents, making them particularly well suited for PFAS work alongside pesticide and endocrine disruptor analysis.

Pesticides, PAHs, hormones, and SVOCs occupy a middle ground, often requiring solid phase extraction with flexible cartridge and disk options to accommodate varying sample volumes and concentration requirements. Systems like the SPE2000 handle this by supporting cartridges from 1 mL up to 12 mL and sample volumes from 10 mL up to 1,000 mL, processing up to 80 samples in a single run.

Food, feed, and environmental matrices in practice

Translating matrix categories into real-world laboratory workflows reveals just how diverse the practical demands are. Food and feed samples are among the most analytically complex matrices encountered in routine monitoring programs, combining high lipid content, variable moisture, and regulatory requirements that demand rigorous method validation.

Food and feed

Animal fats, fish oils, eggs, meat, and compound feed all require thorough lipid removal before dioxin and PCB analysis can proceed. Automated purification systems like the GO-EHT are validated for exactly these matrices, and published research supports their performance across food and feed monitoring under European regulatory criteria. The system eliminates cross-contamination between samples because the sample itself never comes into direct contact with the instrument, a significant advantage when processing high-fat matrices back to back.

Soil, sludge, and sediment

Environmental solid matrices such as soil, sewage sludge, and sediment are routinely analyzed for dioxins, PCBs, and PAHs in site assessment and regulatory compliance programs. These matrices often contain high levels of organic matter and other interferences that make automated cleanup particularly valuable. The SER-158 extraction system integrates directly with GO-EHT cleanup, providing a complete automated pathway from raw soil sample to purified extract ready for injection.

Water and air

Surface water and wastewater monitoring for PFAS, pesticides, and emerging contaminants involves processing large volumes to reach detection limits in the parts-per-trillion range. The AutoEmpore’s multi-channel configuration, available in 3, 6, 9, or 12 channels, allows parallel or series operation to match laboratory throughput requirements. Air samples collected on filter media or adsorbent traps follow a similar extraction pathway to solid matrices once the collection medium has been prepared.

When sample complexity demands full automation

Manual sample preparation introduces variability at every step, and for complex matrices analyzed at trace levels, that variability translates directly into unreliable results. Full automation becomes not just a productivity tool but a quality assurance measure when laboratories are dealing with high sample loads, tightly regulated analytes, or matrices that require multi-step cleanup sequences.

Laboratories running dioxin or PCB programs under ISO 17025 accreditation face particular pressure to demonstrate method consistency across analysts, shifts, and sample batches. Automated systems remove analyst-to-analyst variability from the extraction and cleanup stages, which are historically the most error-prone steps in the entire analytical chain. When combined with automated concentration using systems such as the CentriVap or MultiVap 64, the entire workflow from raw sample to injection-ready extract can be standardized and documented.

High-throughput demands also drive the case for full automation. A system capable of processing 80 samples per run, as the SPE2000 does, or extracting six solid samples simultaneously, as the SER-158 does, fundamentally changes what a laboratory can deliver within a given timeframe. For laboratories offering outsourced analysis services or managing seasonal monitoring campaigns, this capacity is a genuine operational differentiator. As a laboratory automation supplier with expertise across dioxins, PFAS, PCBs, and pesticides, selecting the right combination of extraction, cleanup, and concentration systems for a specific matrix portfolio is the most important decision a laboratory can make when modernizing its sample preparation workflow.

How DSP-Systems helps with automated sample preparation

DSP-Systems brings together a portfolio of proven automated sample preparation platforms specifically selected for laboratories analyzing environmental contaminants across complex matrices. Whether the challenge is dioxin purification in food, PFAS extraction from water, or multi-residue pesticide analysis in soil, DSP-Systems provides the right system for the job:

GO-EHT systems for fully automated cleanup of dioxins, PCBs, PBDEs, and PCNs across food, feed, soil, sludge, water, and air matrices
SER-158 for solvent extraction of solid and semi-solid samples with integrated solvent recovery and compatibility with GO-EHT cleanup
AutoEmpore and SPE2000 for high-throughput SPE of PFAS, pesticides, PAHs, hormones, and SVOCs from liquid matrices
CentriVap, MultiVap 64, and MultiVap 12 for automated concentration and evaporation at the final stage of sample preparation
Pre-installation programming, application testing, and configuration aligned with EPA and CEN standards

If your laboratory is looking to reduce solvent consumption, eliminate cross-contamination risks, and increase sample throughput across any of these matrices, contact DSP-Systems to discuss which automated solution fits your specific workflow.