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Essential Equipment for Setting Up a Cannabis Testing Laboratory

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A technician works at a stacked HPLC system in a testing laboratory.
Photo: Ghai Sahib / Pexels

Setting up a cannabis testing laboratory demands precision, accuracy and compliance with state rules, and it starts with the equipment. Before you spend upwards of a million dollars on instruments, talk to someone who has set up a lab. Refurbished instruments can save a lot of money. So can buying the right equipment the first time, instead of reordering it and losing the week or longer it takes to arrive.

This guide covers the core instruments and the supporting equipment a testing lab needs, what each one measures, and how that maps to what your state requires.

High-performance liquid chromatography (HPLC)

HPLC is the cornerstone of cannabis testing. It quantifies cannabinoids and other compounds in a sample. This is your potency test: it tells you how much THC is in a sample, and that is the number that goes on the label. Its sensitivity and versatility make it the standard instrument for state-mandated potency testing. Your method decides whether the system needs a UV-Vis detector or a diode array detector (DAD). For more on how HPLC compares with the alternatives, read our post on potency methods.

Gas chromatography-mass spectrometry (GC-MS)

GC-MS is the instrument for volatile compounds, including terpenes and residual solvents. It separates compounds by volatility, and the mass spectrometer identifies them specifically. That matters for compliance and for the safety of the product. Residual solvent results don’t go on the label, but the manufacturer has to pass the test before the product can be sold. You wouldn’t want to consume a concentrate that still had butane in it.

For residual solvents, headspace GC is the most common approach: the instrument heats the sample in a sealed vial and injects only the vapor, with a flame ionization detector (FID) or a mass spectrometer behind the column.

Liquid chromatography-mass spectrometry (LC-MS)

LC-MS combines the separation of liquid chromatography with the identification power of mass spectrometry. It’s the instrument for pesticides and mycotoxins, usually as a tandem system (LC-MS/MS). You can’t be there to see how the producer grew the flower, but you can make sure the end result is safe for the public.

One catch before you order: several state pesticide lists include compounds that ionize poorly by electrospray, the usual LC-MS/MS source, such as PCNB, captan and chlordane. GC-MS/MS handles those better, so check your state’s list against your instruments.

Inductively coupled plasma-mass spectrometry (ICP-MS)

Heavy metals need their own instrument. ICP-MS measures arsenic, cadmium, lead and mercury after the sample is digested in acid, and it is the basis of AOAC’s official method for heavy metals in cannabis (First Action 2021.03). Whether you need it on day one depends on the state. California requires heavy-metals testing on every sample (Cal. Code Regs. tit. 4, §15723). Washington requires it only for product made to its Department of Health standard and makes it optional for everything else (WAC 314-55-102).

Supporting equipment

  • Sample preparation tools. Homogenizers, centrifuges and filtration systems. Results are only as representative as the sample that went into the vial.
  • Analytical balances. Every result starts with a weight, so the balance has to be precise and calibrated.
  • Calibration standards. Certified reference materials and calibration standards. You don’t know how much analyte an unknown sample holds until you calibrate the instrument with a curve built from known amounts of it.
  • Microbiology equipment. A qPCR system or culture plates and incubators, and a biosafety cabinet, for the microbial panel.
  • A LIMS and the data pipeline behind it. Results should move from the instrument to the certificate of analysis without anyone retyping them. That is the work behind our lab data and LIMS service.

Meeting state requirements

Each state writes its own rules for testing, which can include requirements for instruments, calibration and reporting. Check yours in our state regulations explorer before you buy, and expect the rules to move. California, for example, has revised its pesticide action levels, effective October 1, 2026.

Buy once

The right instruments are the foundation of accurate, compliant and reliable testing. If this is the first time you’ve heard of an HPLC, you’ll struggle to find methods that separate every analyte your state requires, to buy the equipment those methods call for, and to develop the methods further when something goes wrong. Get help before you buy, not after: it saves you the heartache, and it saves the consultant you’d hire later a headache. If you’re building a lab from an empty room, that’s our Lab-in-a-Box work.