Essex Scientific Laboratory Supplies Limited (ESSLAB) products

Accredited Standards Certified Reference Materials (CRM) are of the very highest quality and are manufactured using ultra high purity acid and 18 megohm doubly deionized water that has been filtered through a 0.2 micron filter. They are suitable for use as calibration test or quality control materials for ICP-AES, OES and MS analysis and packaged in 125ml and 500ml bottles to minimise contamination.