Detection levels of drinking water contaminants using field portable ultraviolet and visible light (uv/vis) spectrophotometry /
Title of Thesis: “Detection Levels of Drinking Water Contaminants using Field
Portable Ultraviolet and Visible Light (UV/Vis)
Author: MAJ Scott H. Newkirk
Master of Science in Public Health
Thesis Directed by: CDR Gary L. Hook
Department of Preventive Medicine and Biometrics
The current EPA approved methods for the analysis of drinking water
contaminants are expensive, require skilled lab technicians, and are not conducive to
military field operations. The HACH DR/4000-U offers an easier, more portable, water
detection system using a Ultraviolet/Visible Spectrophotometer. The DR/4000U was
tested against 19 EPA inorganic drinking water contaminants at six concentrations.
For all 19 contaminants, the DR/4000U was able to detect well below the EPA
Maximum Contaminant Levels. The DR/4000U was reasonably accurate and precise.
The highest four concentrations were within 25% of the known standards for all 19
contaminants. 97% of the replicate samples analyzed at the highest four concentrations
had less then 25% RSD. The system is reasonably compact and rugged but the delicate
glassware, many reagents and cleanliness indicate this system is well suited to a climate
controlled operating location but is not well suited to field use.
School:Uniformed Services University of the Health Sciences
School Location:USA - Maryland
Source Type:Master's Thesis
Keywords:hydrolysis light sensitivity and specificity occupational exposure health specimen handling disaster planning environmental monitoring risk assessment reproducibility of results terrorism chemical national security spectrophotometry ultraviolet water supply pollutants time factors arsenic cyanides sulfates chlorides
Date of Publication: