18种金属ICP混标, Custom ICP Standard @ 1000 μg/mL in Water-95% Nitric acid-5% Hydrofluoric acid-tr

13种醛酮-DNPH衍生物混标,不同浓度溶于乙腈, Custom DNPH Standard@ Varied conc. In Acetonitrile

4种金属ICP混标, Custom ICP Standard @ 1000 μg/mL in Water-95% Nitric acid-5% Hydrofluoric acid-tr

15种硝基苯混标100&1000 ug/mL in Hexane:Toluene (30:70)(硝基苯与邻,间,对硝基甲苯为1000ug/ml), Custom Nitrated Standard @ Varied Conc.in 30% Toluene 70% Hexane

14种醛酮-DNPH衍生物混标,不同浓度溶于乙腈, Custom DNPH Standard@ Varied conc. In Acetonitrile

甲醇中13种苯胺类与2种联苯胺混标(HJ 1210-2021), Custom SVOC Standard @ Varied Conc in Methanol