rubber stoppers / calibration solutions / dilution standard solution / plastics / chemical compound / Stock standard solutions / gas chromatograms / Helium carrier gas flow / all-glass systems / sample processing apparatus / needed analyte solutions / chemicals / chemical analysis / diazomethane solution / mechanical device / performed using diazomethane solution / /
Organization
National Park Service / ENVIRONMENTAL MONITORING SYSTEMS LABORATORY OFFICE OF RESEARCH AND DEVELOPMENT U.S. ENVIRONMENTAL PROTECTION AGENCY CINCINNATI / Occupational Safety and Health Administration / Environmental Protection Agency / /