AMIS have been an excellent supplier and partner to Choice Analytical. Their team are consistently responsive, helpful with both general and technical enquiries, and always quick to support us despite the time zone differences. We also find their certified reference materials to be of outstanding quality, which reflects in the confidence our customers have in their products. - Ben Dickson, 2025- Choice Analytical, Australia

AMIS products function primarily as guard rails in attaining a true value of submitted sampled material from the resource and this benefits the company’s reporting during declaration of resource estimate.The Particle Group which supplies AMIS products over the years have stood out in service excellence, pricing of products and product knowledge from their dedicated team, and I recommend them at any time to anyone. - Stephen Michaels, Section Valuator, 2025- Harmony Gold Mining, South Africa

Working with the customer care team at AMIS has always been a pleasant experience. The team is consistently warm, polite, and courteous, making every interaction easy and professional. I’ve never had a reason to complain, and I sincerely encourage the team to continue with the excellent service.
Kansanshi Mine has been sourcing standard materials from AMIS for over 15 years—clear evidence of the consistent quality of their products. While our preference has often been to use Certified Reference Materials (CRMs) derived from locally produced ore samples, AMIS standards have always maintained credibility. At no point has the authenticity of their certification process been in doubt, even when using externally sourced materials. - Gideon Bwishi, Mine Geologist, 2025- First Quantum Minerals, Zambia

We are pleased to express our continued satisfaction with the quality products and service we received from AMIS. In particular, we are satisfied with AMIS as an accredited producer of matrix matching CRMs and Proficiency Testing Scheme provider. We remain satisfied with AMIS as an internationally reputable and credible service provider that provides us with competently certified, reliable and trustworthy, and well-priced CRMs. We do look forward to maintaining and strengthening our mutually beneficial relationship going into the future. - George Molepo, Laboratories QAQC Principal, 2025- Glencore Copper Africa (Kamoto Copper Company & Mutanda Mining)