Determination of non-extractable triazine residues by enzyme immunoassay: investigation of model compounds and soil fulvic and humic acids

Article Abstract:

Enzyme immunoassay (EIA) technique was utilized in the analysis of atrazine residues in agricultural soils. EIA technique with polyclonal sheep antibodies against atrazine exhibited high sensitivity to triazines that are bound to humic material. Furthermore, the atrazine-recognition by polyclonal sheep antibodies was not altered by the interaction of the protein with arylamino-s-triazines in the soil samples. The EIA technique can be utilized for the laboratory analysis of soil leachates, water samples and humic materials.

Surgical and Medical Instrument Manufacturing, Surgical and medical instruments, Enzyme Immunoassay Tests, Soils, Composition, Enzyme-linked immunosorbent assay, Medical testing products, Immunoenzyme techniques

---

Evaluation of primary photoproduct quantum yields in fulvic acid

Article Abstract:

The energies and quantum yields for the formation of triplet states in aqueous solutions of Laurentian and Armadale fulvic acids were investigated using time-resolved photoacoustic spectroscopy together with magnetic circular dichroism spectroscopy. The results showed that the Laurentian sample featured yields which ranged from 0.79 to 0.28 for the pH range 2.0 to 9.5. The Armadale sample had a yield ranging from 0.82 to 0.35 for the same pH range.

Research, Measurement, Quantum optics

---

Structural characterization of a fulvic acid and a humic acid using solid-state Ramp-CP-MAS 13C nuclear magnetic resonance

Article Abstract:

A new cross polarization magic angle spinning (CP-MAS) nuclear magnetic resonance technique allowed the accurate structural characterization of a fulvic acid and a humic acid. Results revealed that carbohydrate moieties play a significant role in the fulvic acid and contain the major chemical functionality. The spectra and relaxation parameters obtained allowed the development of two models for the fulvic acid and the humic acid.

Research and Development in the Physical, Engineering, and Life Sciences, Analytical Laboratory Instrument Manufacturing, Analytical instruments, Pollution R&D NEC, Nuclear Magnetic Resonance Instr, Magnetic resonance imaging, Nuclear magnetic resonance, Pollution control research

Similar abstracts:

• Abstracts: Detection of heavy metals by immunoassay: optimization and validation of a rapid, portable assay for ionic cadmium
• Abstracts: Chemical preservation of volatile organic compounds in soil. Round-robin study of performance evaluation soils vapor-fortified with volatile organic compounds
• Abstracts: Where do particulate toxins reside? An improved paradigm for the structure and dynamics of the urban mid-Atlantic aerosol
• Abstracts: Nitrate-induced photolysis in natural waters: controls on concentrations of hydroxyl radical photo-intermediates by natural scavenging agents
• Abstracts: Mulching as a countermeasure for crop contamination within the 30 km zone of Chernobyl Nuclear Power Plant. Particle and plutonium mobilization in macroporous soils during rainfall simulations

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.