Colorimetric determination of glyphosate in water using ozonolysis followed by spectrophotometric analysis of phosphate product with molybdenum blue reagent: a simple, fast and inexpensive assay of glyphosate.

Simple item page
dc.contributor.advisorPlatz, Matthew
dc.contributor.authorCriscione, Rose
dc.contributor.departmentTropical Conservation Biology & Environmental Science
dc.date.accessioned2023-02-03T00:39:48Z
dc.date.available2023-02-03T00:39:48Z
dc.date.issued2022-12
dc.description.degreeM.S.
dc.identifier.urihttp://hdl.handle.net/10790/7323
dc.subjectChemistry
dc.subjectAnalytical chemistry
dc.subjectEnvironmental science
dc.subjectGlyphosate
dc.subjectMolybdenum blue reagent
dc.subjectOzonolysis
dc.subjectSpectrophotometry
dc.titleColorimetric determination of glyphosate in water using ozonolysis followed by spectrophotometric analysis of phosphate product with molybdenum blue reagent: a simple, fast and inexpensive assay of glyphosate.
dc.typeThesis
dcterms.abstractA simple and inexpensive assay for quantifying glyphosate in aqueous environments using ozonolysis followed by spectrophotometric analysis of phosphate product with the molybdenum blue reagent has been developed. Glyphosate was oxidized with ozone gas in the presence of sodium hydroxide (1*10-3M) and then reacted with the molybdenum blue reagent to yield a colorimetrically quantifiable phosphate product. The absorbance of the heteropoly blue color complex was measured at 830 nm. The concentration of glyphosate was determined using a standard phosphate calibration curve concentration range from 10-4 to 10-8M in the presence of NaOH (1*10-3M). The reliable detection limit of glyphosate in aqueous environments when using ozonolysis and spectrophotometric methods was found to be 1*10-5M. The method developed in this study may be applicable in aquatic environments such as streams and estuaries and can be used by high school students, undergraduates, and field workers to obtain quantitative data.
dcterms.extent16 pages
dcterms.languageen
dcterms.publisherUniversity of Hawaii at Hilo
dcterms.rightsAll UHH dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
dcterms.typeText
local.identifier.alturihttp://dissertations.umi.com/hilo.hawaii:10231

Files

Original bundle
Now showing 1 - 3 of 3
Thumbnail Image
Name:
Criscione_hilo.hawaii_1418O_10231.pdf
Size:
718.93 KB
Format:
Adobe Portable Document Format
Download
Thumbnail Image
Name:
Criscione_Appendix1.pdf
Size:
405.96 KB
Format:
Adobe Portable Document Format
Download
Thumbnail Image
Name:
Criscione_Appendix2.pdf
Size:
345.15 KB
Format:
Adobe Portable Document Format
Download

Collections

Tropical Conservation Biology and Environmental Science
TCBES Theses