Analysis & Testing


Alex Stewart Internationals’ laboratories tailor their services to deliver cost effective and fast turnaround laboratory analysis without compromising quality and result accuracy. Its UK HQ laboratory is accredited by UKAS to ISO 17025 standards.

All of our laboratories are strategically located to work together with international commerce and industry in Argentina, Brazil, Chile, China, Ecuador, India, Kenya, Malaysia, Peru, Thailand, UAE, Ukraine and the UK. All chemists are fully qualified and experienced and all laboratories are supported by full sample preparation facilities for bulk samples.

Metals and minerals laboratories are purpose built, fully equipped with traditional and modern instrumentation, to provide a fast, reliable and accurate results for commercial metal analysis for active mine productions including copper, lead and zinc; metal refineries for end producers and also commodity traders at the consumer end of the value chain, whether metals, minerals or agricultural commodities; for geochemical and environmental analysis for global and junior mining exploration companies, and also mine audits for Governments who require financial due dilligence in emerging and developing countries.

Aquaculture and agriculture laboratories carry out GAFTA and FOSFA approved analysis on sealed shipping samples, contract and international reference samples for biomass, oils, fats, oilseeds, edible nuts, fatty acids, acid oils, distillates, animal feed, grain, wheat, rye, barley, oats, millet, peas, beans, soya, fish and food products. ASI laboratories also provide analytical services and certification for food testing such as nutritional and calorific values, trace metal detections for animal feeds and also for biomass. Microbiological testing for major pathogenic and spoilage microorganisms are carried out in UK and China and services include processed cooked or uncooked meats, food, beverages and dairy products.

Environmental laboratories work to ISO standards and report organic and non-organic parameters to ppm and ppb levels. Types of analysis include waters and bacteria in water, pollutants, heavy metals, anions, seawater; soils and sewage treatment for heavy industry; environmentally sensitive mining projects and also geological research and development projects.

All laboratories combine traditional wet chemistry methods with modern state of the art laboratory instrumentation

ICP MS/OES (+Trace Metal Detection)Gas Chromatography
XRFGC Mass Spectrometry
Atomic AbsorptionFibertec
Isoperibol CalorimeterHPLC
DR 2800 SpectrophotometerViscometer
Flame PhotometryKarl Fischer
Carbon SulphurTitration

Our Locations 

A Global Network

ASI Inspections, Loads and Discharge Operations

ASI Laboratory, Sample Preparation and Customer Services

ASi Government Business Head Quarters

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