HDPE Bottles KaptClean® for Metals meet or exceed analyte specifications. Analytes that are commonly analyzed include Inorganics, BOD5, CBOD, Residues: TS,TSS, TDS, Hardness, Ammonia, TKN, Nitrate, Nitrite, and COD. Bottles are pre-cleaned based on OSWER (Office of Solid Waste and Emergency Response) directives from the EPA (Environmental Protection Agency). Suggested for metal, cyanide, sulfide, and fluoride analysis. All pre-cleaned containers are supplied pre-assembled with caps attached.