ELN and LIMS Basics
TL;DR
A laboratory information management system (LIMS) is software that tracks samples and the work done on them, from the day they arrive or are made until they are used up or discarded. Each sample has an ID, a location, a status and a history, and it links to results, so the lab can trace any sample back to its source.
A laboratory information management system (LIMS) is software that manages samples and the data attached to them. Every sample gets a unique ID, a storage location, a status and a history of everything that has happened to it. So the lab can say where a sample is, and where it came from, without opening a freezer.
A LIMS is often confused with an electronic lab notebook (ELN). The ELN documents the experiment and the scientist's reasoning, while the LIMS tracks the physical material. It also gets mixed up with a laboratory information system (LIS), the patient-centered equivalent used in clinical diagnostic labs. And an inventory spreadsheet is something else again, a list of items with no history of who changed what.
The record starts when material arrives or is made. Banking a new cell line goes roughly like this:
Barcodes do most of the work at the bench. Scanning a tube pulls up its record, which is faster than typing an ID with gloves on and avoids misreading a handwritten label on a frosted tube.
Because each of those steps is timestamped and attributed to a user, the sample's chain of custody builds up during normal work. Nobody keeps a separate log.
No, though that is where LIMS software started. Analytical and QC labs push large numbers of samples through the same tests day after day, and every result has to be reported against the right sample, so they needed sample login and result approval long before most research groups used any software at all. A traditional LIMS still shows that heritage: it is organized around samples and workflows more than around experiments.
Research labs tend to arrive from the other direction, once several people share the freezers and the samples start having parents and children. The trigger is often mundane. The person who organized the -80 °C freezers goes on leave, and nobody else knows which box holds the aliquots reserved for someone's next experiment.
With linked records, you filter for it. Say a lot of fetal bovine serum turns out to be contaminated. The lab manager needs every culture and every experiment that touched it, and when sample histories are linked to experiments, that list takes a minute. With paper logs it takes a week of reading notebooks.
Where studies are conducted under GLP, documenting the identity and storage of specimens is a regulatory requirement, and LIMS records are often part of what an inspection reviews. Outside GLP the same records let you repeat an experiment with the same material, or explain why you can't.
Decide what counts as a sample in your lab and what fields each sample type needs. A plasmid and a tissue block don't share much metadata, and one generic form for everything produces poor data. Set an ID convention once and let the system assign the IDs.
Then build the storage structure, with freezers, racks, boxes and box positions set up as a nested hierarchy. Load one freezer completely before starting the next, because people stop trusting a LIMS that is half loaded. Bulk upload from the existing spreadsheet saves weeks, but clear out the duplicates first. The post on LIMS vs ELN vs SDMS covers how a LIMS fits next to the other systems in a lab.
IGOR is a cloud-based electronic lab notebook (ELN) and LIMS in one platform, and its Inventory (LIMS) module sits alongside the notebook. Repositories are configured per team with custom metadata fields, sample IDs are assigned automatically, and storage locations are set up as a nested hierarchy of Facility, Site, Equipment and Location. Each sample's Sample History records every action with a timestamp and the user who performed it. Samples can be assigned to experiments without being removed from stock.
A spreadsheet works for one person with a few hundred items. Once several people share freezers and samples have parents and children, a LIMS is worth it, because a spreadsheet has no audit trail and can't show which experiment used which vial. The tipping point is usually the first time someone can't find a sample they know exists.
A LIMS is sample-centered and used in research and QC labs, while an LIS is patient-centered and used in clinical diagnostic labs, where it handles test orders and diagnostic reports linked to patient records.
Yes. Several platforms combine the two, so a notebook entry links directly to the samples it used and nobody enters the same information twice. If you are evaluating one, check that both halves hold up on their own: a notebook with signatures and witnessing, and an inventory with storage locations and sample history.
A LIMS tracks each sample's unique ID, storage location, status and full history of actions. Most systems also hold custom fields such as concentration, volume, passage number or lot number, along with parent and child links for aliquots and derived samples. In a combined ELN and LIMS, the record also lists the experiments the sample went into.
No, typed or auto-assigned IDs work, but barcodes cut transcription errors and make lookups at the bench much faster. Most labs print labels from the LIMS and read them with a standard 1D or 2D scanner. In IGOR, every inventory item is automatically assigned a unique barcode linked to its sample ID.