... system.FFX (basic analytical type pure water machine): Preparation of buffer solution, chemical reagent, culture medium; Routine ... buffer solution, High purity standard solutions, quantitative analysis of microelement, HPLC highly active liquid chromatogram: toxicitytest, race ... FJY (gene research type ultrapure water machine):DNA/RNA preparation, DNA sequencing, HPLC(amino acid) , penicillin analysis ...