Food, Agriculture & Environmental

Alex Stewart Agriculture is a UKAS ISO/IEC 17025: 2005 accredited company providing world class FOSFA, GAFTA and UKAS approved inspection and analysis services. It is supported by the A. Norman Tate, Huson and Hardwick and Food Test Laboratories for the facilitation of the international trading of soft commodities including animal feed, oilseeds, oils & fats, bio diesel, grains and cereals, fertilizers, raw & refined sugar and food products.

Bio-mass inspection and analysis
Alex Stewart Agriculture provides the full range of FOSFA approved inspection and analytical testing for Bio-mass, Bio-fuels and all related by-products in accordance with the international EN 14214 quality requirements.

In this fast developing industry sector the extensive experience of our professional analysts and internationally accredited laboratories are critical advantages. Accurate bio-mass analysis combined with fast effective turnaround times are assured.

Our procedures for Bio-mass covers the full analytical spectrum for phosphate, fat content, oil, moisture, ash, gross calorific value, fibre and carbohydrates.

Glycerine M.O.N.G.
Glycerol Rape meal: Oil, moisture, protein ash
Moisture (KF) OSR & Oil: Full Analytical Services

Environmental - Soil, Air & Water Analysis
Our laboratories in Argentina, Chile, Norway, Peru and the UK provide environmental services to agricultural, food, construction, petro-chemical, recycling and waste management industries. Environmental analysis is supported by sampling, sample collection, e-certification, technical consultancy and friendly customer service.

Potable water Sea and fresh water
Bottled mineral water Swimming, Jacuzzi and spa pools
Processed wastewater Effluence and sewage water
Landfill and soil Surface hygiene

A total of 240 analytical tests can be performed, including full metal analysis. Frequently requested tests include:

• Ammonia, nitrogen • Chromium, total • Phosphorous
• Bromine • Colour • Silica
• Chloride • COD • Sulphate
• Chlorine, free • Fluoride • Sulphide
• Chlorine, total • Hardness • Surfactants
• Chromium, hexavalent • PCB • Suspended solids
• TOC • Tannin • Volatile Acids

Microbiological Testing in Soil and Water
•  Pseudomonas aeruginosa
•  Coliforms presumptive/confirmation

Complete analysis is available for:
•  Escherichia coli presumptive/confirmation
•  TVC @ 22º, 30º & 37º

Fertiliser - GAFTA Inspections and Analysis
Alex Stewart International
provides GAFTA approved fertiliser inspections and analysis in Argentina, Baltic States, Belgium, Brazil, Chile, France, India, Italy, Netherlands, North America, Peru, Scandinavia, Spain, UK, and all Ukrainian and Black Sea ports.  Fast and accurate fertiliser analysis is carried out by experienced and qualified chemists using both classical and modern methodology:

Kjeldahl method for Nitrogen ICP for Magnesium sulphate and Potassium
Gravimetric method for phosphates Biuret in urea by spectrophotometric method

Food - Microbiological Testing, Chemical and Nutritional Analysis

Alex Stewart International's Food Test Lab is an independent and UKAS approved microbiological, chemical and nutritional food testing laboratory. Food Test Lab services provide ISO 17025 accredited microbiological, chemistry and nutritional analysis services for your foodstuffs – especially important if you need detailed nutritional information for food labelling purposes. Our accredited analytical services enable you to meet food labelling and safety regulations, achieve best practice and, above all, satisfy your consumers.

For further information about our UK Food Testing Laboratory please visit:

For further information about our Food Testing Laboratory in China please

Alex Stewart’s ISO 17025 fully accredited food testing laboratories in the UK carry out the most accurate time focused microbiological testing and food analysis including:

• Moisture • Fats and fatty acid
• Proteins • Starch
• Sodium • Fibre and ash
• Energy value • Peroxide value
• Salt • Salmonella spp
• Group I and Group II Nutritional Analysis • Listeria 
• Dietary fibre • E-coli
• Fats and Oils • Bacillus cereus
• Mono-unsaturates • Staphylococcus aureus
• Poly-unsaturates • Enterobacteriaceae
• Carbohydrates • Coliforms
• Sugars • Streptococcus
• Calorific value • Clostridium perfringens

Grains - GAFTA Analyst and Superintendent
Through Alex Stewart Agriculture and Huson and Hardwick Laboratories, who act as cargo superintendents and long standing analyst member of the Grain and Feed Trade Association (GAFTA), Alex Stewart International works closely with many of the world's leading grain traders to provide independent monitoring, testing, technical inspection and consultancy, in full compliance with GAFTA 124 sampling procedures.

We can also arrange logistical and fumigation services, to ensure that cargoes are transported in the correct and approved condition, additionally, in Brazil, Malaysia and Indonesia our technically qualified inspectors provide the industry with collateral management agreements -CMA, including crop monitoring, storage supervision for grains, feed, fertiliser and sugar, maintaining full control and supervision of transportation between storage facilities, loading and discharge supervsion, and certifying quantity and quality of customers imported and exported agricultural commodities.

Technical consultancy services represent another speciality area at Alex Stewart Agriculture . Our strategically and commercially located operational offices offer support and advice regarding ports and silos, and provide informative interpretation of the latest industry standards concerning the sampling and analysis of grains and cereals are transported in the approved and correct condition.

Grains, wheat, barley, maize, oats and soybean analysed and certified for quality include the following tests:

•  Moisture •  Aflatoxins
•  Protein or nitrogen •  Admixture
•  Specific weight •  Hectolitre weight
•  Hagberg falling number •  Radiation tests
•  Infestation •  GMO tests

Oils, Fats and Oilseeds - FOSFA Analyst and Superintendent
Alex Stewart International is an established and internationally recognized superintendent member of the Federation of Oils Seeds and Fats Associations (FOSFA), the Palm Oil Refiners Association of Malaysia (PORAM) and the Malaysian Palm Oil Board (MPOB).

Groundnut oil Cottonseed oil Sunflower Oil
Rapeseed oil Olive oil Linseed
Soybean oil Tallow Corn oil
Palm oil Rapeseed Palm kernel oil
Lard Glycerine Sunflower seed
Coconut oil Walnut Sheanut
Fish oil Copra  

Alex Stewart International's strategically located FOSFA and ISO accredited oils, fats and oilseeds laboratories are located in Argentina, India, Peru, Ukraine and the U.K. (A Norman Tate and Co Ltd) to provide fast accurate results and a comprehensive range of analytical services to the industry, tests include:

Moisture Free fatty acids Density
Impurities Unsaponifiable matter Metal trace elements
Lovibond colour Volatile matter Flashpoint

Rice - GAFTA Analysts and Superintendents
Well established in the analysis and inspection of rice shipments, we provide the complete service portfolio, including pre-shipment inspection, supervision of loading and discharge, sampling, weight control and tallying to analysis in our GAFTA approved laboratories.

Our laboratories in Argentina, Chile, India, Malaysia, Norway, Peru, Thailand and the UK are equipped with the latest instrumentation, from precision balances to gas chromatographs and polarimeters.

Moisture Foreign matter Test weight
Protein Broken/chalky Infestation
Starch Specific weight  
Milling quality Yellow/damaged

Sugar - London Sugar Associate
We are able to provide a full range of CMA, inspection and analytical services to the sugar industry. Refined, raw, bulk, bagged and liquid sugars are all effectively analysed with the company's characteristic speed and precision. 

Dedicated sugar laboratories in Santos Brazil, Santiago Chile, Lima Peru and in Liverpool England enable us to provide a fast, reliable and accurate service to the international sugar trade. These well-equipped laboratories are members of the Sugar Association of London (SAL) and participate in quarterly round-robin analytical exercises, to ensure a consistently high quality service, whilst maintaining the rapid turnarounds the international trade requires.  Analytical services include:

•  Colour
•  Polarization
•  Moisture
•  Ash

For further information, please email: or talk about any of our agriculture services with Mr. Glenn Forbes directly on + 44 151 525 1488