AccuStandard is the only standard supplier in the United States that has been certified by NIST, NALAP, and EPA, and has passed ISO 9001&17025 quality management system certification. It can produce various types of standards for EPA, ASTM, and NIST in the United States. AccuStandard products are popular in 108 countries worldwide, with a product line that includes over 11000 standard substances and 22000 specially customized standard substances, covering testing fields such as pesticides, petrochemicals, environmental, food, inorganic, and tobacco. AccuStandard has several star product lines, including 209 types of polychlorinated biphenyls (PCBs), over 180 types of polybrominated diphenyl ethers (PBDEs), and halogenated dioxins and dibenzofurans, demonstrating AccuStandard's strong organic synthesis capabilities.

PBB (polybrominated diphenyl ether) and PBDE (polybrominated diphenyl ether) each have 209 isomers, for a total of 518 isomers. However, the characteristic ions, retention times, and ratios between characteristic ions (all decomposed into benzene rings and individual bromide ions by the ion source) of different isomers are basically the same in GC-MS analysisSo as long as the relevant parameters of one isomer are obtained, the parameters of other isomers are also basically the same Therefore, the cheapest isomer can be selected to detect all isomers with the same number of bromine atoms