ICP-MS System for Heavy Metals in Food

What is the ICP-MS System for Heavy Metals in Food?

An ICP-MS system for food measures lead, cadmium, arsenic, mercury and other elements at microgram per kilogram levels in a single run. It is the primary platform for multi-element compliance testing of rice, seafood, beverages and infant foods.

Overview

The acid digest is nebulised into an argon plasma at about 6000–8000 K, where elements are atomised and ionised. Ions pass through an interface into a quadrupole mass analyser that separates them by mass-to-charge ratio, and a detector counts them in pulse or analog mode over a wide dynamic range. A collision or reaction cell with helium or hydrogen removes polyatomic interferences that would otherwise bias arsenic and selenium results. Internal standards such as rhodium, indium or germanium correct for drift and matrix effects, and isotope dilution can be used for the most demanding work. Detection limits reach 0.01–1 µg/kg for many elements. Some systems include a chromatographic front end for arsenic and mercury speciation.

How does it work?

Contaminant analysis combines an extraction and clean-up step with an element-selective or mass-selective detector. Elemental contaminants are measured by atomic spectroscopy: samples are digested in strong acid under heat or microwave energy, then aspirated into flame atomic absorption, graphite furnace atomic absorption or an inductively coupled plasma coupled to mass spectrometry, which reaches microgram per kilogram levels for lead, cadmium, arsenic and mercury. Organic contaminants are measured by chromatography with mass detection. Mycotoxins and veterinary drug residues are separated by liquid chromatography and detected by tandem mass spectrometry in selected reaction monitoring mode. Process contaminants such as acrylamide, chloropropanols and polycyclic aromatic hydrocarbons are usually separated by gas chromatography with tandem mass detection. Isotope-labelled internal standards correct recovery and matrix effects.

What are the key features?

• Multi-element analysis at 0.01–1 µg/kg detection limits
• Collision or reaction cell for interference removal
• Wide dynamic range covering trace to percent levels
• Auto-sampler with rinse and internal standard addition
• Optional chromatography front end for speciation
• Compliance software with QC checks and audit trail

What are the technical specifications?

A typical icp-ms system for heavy metals in food configuration offers mass range of 2–260 m/z, detection limits of 0.01–1 µg/kg for As, Cd, Pb, Hg, plasma gas flow of 13–15 L/min argon, sample introduction of Nebuliser and spray chamber, collision cell gas of Helium, hydrogen or oxygen and dynamic range of 9 orders of magnitude. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The ICP-MS System for Heavy Metals in Food is used in rice and cereal heavy metal compliance testing, seafood and aquaculture element monitoring, infant formula and baby food testing and beverage and drinking-water element analysis. Across the wider Contaminant Analysis class, laboratories also deploy it for heavy metal monitoring in rice, seafood and infant food, mycotoxin testing of cereals, nuts and spices and veterinary drug residue control in meat and aquaculture.

Which standards and certifications apply?

Relevant standards and methods include ISO 17294-2, EPA 6020B, Commission Regulation (EU) 2023/915, EN 15662, ISO 16050, SANTE/11312/2021 and ISO/IEC 17025. Certification candidates for this model are CE, ISO 9001 manufacturing and IQ/OQ documentation; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Trace analysis is easily compromised by contamination from reagents, glassware and laboratory air. Use high-purity acids, digested blank checks and a clean, dedicated preparation area, and verify instrument performance with certified reference materials and recovery spiking. Collision or reaction cell gases and tuning solutions must meet the instrument specification, and elemental calibrations need regular verification because drift affects low-level results. For organic contaminants, reference standards are expensive and unstable, so storage and preparation records matter. Laboratories should participate in proficiency testing for the contaminants they report and keep confirmatory ion-ratio criteria under review.

How do I select the right ICP-MS System for Heavy Metals in Food?

Choose ICP-MS when you must report several elements at microgram per kilogram levels and want one method for most metals. Specify collision-cell capability, autosampler size and whether speciation of arsenic or mercury is required. Confirm the availability of high-purity acids, certified reference materials and local service for plasma and pumping components.

How does it compare with other Contaminant Analysis variants?

Choose the elemental technique from the number of elements and the sensitivity required. ICP-MS covers many elements in one run at microgram per kilogram levels and is the default for lead, cadmium, arsenic and mercury, with a speciation option for inorganic arsenic and methylmercury. Flame atomic absorption is economical for higher concentrations of a single element such as sodium, calcium or zinc, while graphite furnace atomic absorption serves low levels where ICP-MS is not available. For organic contaminants, select LC-MS/MS for mycotoxins and veterinary drugs and GC-MS/MS for process contaminants and packaging migrants. Confirm that the compound library, reference standards and validated clean-up procedures exist for your matrices, and compare detection limits with the regulatory maximum levels.