Witega has been a manufacturer of the reference substances for 30 years. We have over 1.200 reference substances in our portfolio that we have in stock.
Chiron provides the scientific community worldwide with sophisticated solutions for difficult chemical analysis. Since 1983 Chiron has supplied reference materials, for toxicological, environmental, food safety and petroleum analysis. Chiron’s of
SPEX CertiPrep was founded in 1954 to provide superior certified reference materials and sample preparation equipment for analytical spectroscopy. Since then, we have gained the experience, skills, and specialized training to serve analytical scientist
DRRR GmbH (DRRR GmbH) is an ISO/IEC 17043 accredited proficiency testing provider and provider of certified reference material.
The Carbohydrate and Nucleoside Experts - Milligrams to Metric Tons, Catalogue Products and CDMO Services,
WELLINGTON là nhà sản xuất các chất chuẩn môi trường nhóm PCDDs/PCDFs and PCBs.. từ những năm 1980.
ISO 17025-accredited, and GMP-certified lab
InterCinD - Thử nghiệm thành thạo quốc tế xác định các hợp chất CDD/F, PAH, METALS, PBDE, PCB-DL, PCB-NDL, PCB-ICES6 trong các lĩnh vực Môi Trường, Công nghiệp & Thực phẩm.
ARCONIC là nhà sản xuất các loại mẫu chuẩn cho các dòng máy Spark-AES, XRF, LIBS, ICP, ICP-MS, and inert gas fusion...
IV là hãng chuyên sản xuất các loại chất chuẩn VÔ CƠ gồn: All Stock Standards