Operating across more than 40 countries, Alex Stewart International (ASI) and its global group of companies provide exceptional inspection, testing, and laboratory analysis services to the metal trade and mining industries worldwide.
“Our approach is professional yet personal,” says Stephen Russell, ASI Group Commercial Executive. “We deliver exceptional technical expertise in inspection, weighing, sampling, analysis, testing, and operational auditing across all commodities and materials.”
At the heart of ASI’s operations is its UKAS ISO 17025-accredited metal testing laboratory in Liverpool, England, offering precise and reliable analysis for nonferrous and ferrous ores, concentrates, minor and precious metals, ferro-alloys, recycled materials, fuels, agricultural commodities, and food products.
Global Inspection Expertise
ASI’s inspection services include supervision of loading and discharge, weighing, and sampling. Its experienced inspectors and surveyors deliver quality assurance for mining companies, traders, metal producers, refiners, and financial institutions — all in compliance with IFIA/TIC-approved standards.
For government clients, ASI conducts operational audits, customs revenue optimisation, and procurement verification, alongside certification of mineral exports and inspection of food and pharmaceutical products.
Pioneering Laboratory Excellence in Africa
In Africa, ASI continues to expand its footprint.
ASI Rwanda Ltd, accredited to ISO/IEC 17025 by the East African Community, serves clients across Rwanda, Burundi, Tanzania, Uganda, Kenya, DRC, Zimbabwe, and Ethiopia.
“Our Kigali laboratory specialises in 3Ts — tin, tantalum, and tungsten — as well as cobalt, manganese, and other base and minor metals,” explains Norman Mwashi, Chief Chemist and Lab Manager at ASI Rwanda.
Established in 2005, ASI Zambia operates in Kitwe, the heart of Zambia’s Copperbelt Province.
“Our lab provides analytical services for copper, cobalt, and precious metals,” says Meleka Saikolo, ASI Zambia Company Manager. “We combine traditional wet chemistry with cutting-edge technology to deliver results you can trust.”
Advanced Instrumentation and Capabilities
- WDXRF Zetium & PW 1480: Principal and trace element determination
- EDXRF XEPOS
- ICP-OES Spectrometer: Multi-element analysis at ppm accuracy
- AAS (Atomic Absorption Spectroscopy): Detection of low-level elements
- High-precision titrators: For elements such as tin, copper, lead, manganese, iron, and chromium
- UV/Visible spectrometer, Conductivity meter, pH meter, Electro-gravimetric set
Contact Information
For information about ASI’s ISO 17025-accredited analytical services in Kigali, Rwanda, contact:
Mr. Norman Mwashi
📞 +250 788 308 077
✉️ norman@alexstewartinternationalltd.rw | info@alexstewartinternationalltd.rw
🌍 www.alexstewartinternationalltd.rw
