|Busted! First Dection of Steroid Hormones in Pacific Walrus Bones|
Charapata P, Horstmann L, and Misarti N
The Pacific walrus (Odobenus rosmarus divergens) is a candidate species for the Endangered Species List because Arctic sea ice has declined significantly in the past decades. This project focuses on validating a method for extracting steroid hormones from archaeological, historical, and modern bone creating a baseline of hormone levels during different climate regimes. The results validate our method of hormone extraction as all steroid hormones were extracted from bones of all time frames.
|Experimental Evolution in Diatoms - Thermal longterm acclimation in two model diatom species|
Katrin Schmidt1, Sinéad Collins2, Thomas Mock1
Experimental Evolution in two model Diatoms
|METHOD DEVELOPMENT FOR THE SIMULTANEOUS DETERMINATION OF METHYLMERCURY AND INORGANIC MERCURY IN SEAFOOD|
Sergio Carneado, Ariane V. Zmozinski, Carmen Ibáñez-Palomino, Àngels Sahuquillo, José Fermín López-Sánchez, Márcia M. da Silva
This work reports the method development for the simultaneous determination of methylmercury (MeHg+) and inorganic mercury (iHg) species in seafood. The study focused on the extraction and quantification of MeHg+ by liquid chromatography coupled to on-line UV irradiation and cold vapour atomic fluorescence spectroscopy (LC-UV-HG-AFS), using HCl 4 mol L-1 as extractant agent.
|Relationships between Water Quality Constituents in the Delta and the Influence of Different Sources of Water|
Richard A. Denton and Paul Hutton
Analysis of detailed grab sample data from San Francisco Bay and Delta and development of regression relationships between EC, TDS and water quality constituents such as chloride, bromide, sodium, calcium, sulfate, alkalinity and hardness. The relationships in the interior Delta vary depending upon the percentage contributions from seawater, agricultural drainage and freshwater inflows.
|Microextraction techniques combined with X-ray fluorescence spectrometry for determination of different metal ions in water|
Karina Kocot (a), Beata Zawisza (a), Eva Marguí (b), Ignasi Queralt (c), Rafal Sitko (a)
In present work new preconcentration procedures combining microextraction techniques and X-ray fluorescence spectroscopy were developed. Proposed methodologies are promising tools for multielemental analysis enabling detection of natural pollutants in different water samples.
|Effects of aquaculture effluents on nitrogen characteristics in two Chinese estuaries|
David Kaiser, Lucia S. Herbeck
The poster describes similarities and differences of the effects aquaculture effluents have on the nitrogen composition in estuarine waters of two sites in southern China
|APPLICATION OF LIQUID CHROMATOGRAPHY WITH UV DETECTION FOR DETERMINATION OF PLANT GROWTH REGULATOR IN COMMON PLANT FERTILIZERS|
Borowczyk K., Wyszczelska-Rokiel M., Stachniuk J., Chwatko G., Glowacki R.
1. The methodology allows facile and accurate determination of IBA in common plant fertilizer samples.
2. The analytical figures of linearity, precision and recovery shown during the method validation procedure are well within the criteria for biological sample analysis.
3. In temperature -18, 4 and 25 °C the analyte stays stable for 6 h.
4. The assay should help in control of phytohormones concentration in plants and fertilizers.
|Examination of Pesticide Residues in Wine, Beer and Their Constituent Products Using High-Throughput Techniques to Maximize Extraction & Efficiency|
Patricia Atkins, Matt Snyder
In this study, commercial red wine and beer samples were examined for their pesticide concentrations.
|MS Data Processing With Full Flexibility Of Universal Processing Software|
Frans Schoutsen, Barbara van Cann, Vincent Jespers, Michal Godula
Liquid Chromatography (LC) in combination with triple quadrupole Mass Spectrometry (MS) is more and more a common analysis technique in routine laboratories. Especially when using MS/MS selected reaction monitoring (SRM) for a large number of components data handling can be a bottle neck. This poster will show MS data processing of pesticides in water samples using an already established chromatography data system which is now also capable of processing large quantities of MS data.
|Automated, Rapid And Reliable Determination Of Dissolved Gases In Water By Static Headspace – Gas Chromatography|
A. Caruso, M. Santoro, F. Bedini, P. Magni, S. Pelagatti
Purpose: Exploring the possibility to perform a quantitative determination of dissolved gases in water in a reliable and accurate way. Methods: The quantification of dissolved gases is performed by building a calibration curve spiking blank water samples with increasing quantities of saturated water followed by headspace sampling and GC/ FID analysis. Results: The results show good correlation factors and limit of quantification lower than 10ppb for the four gas analyzed.
|<<|| 1 2 3 4 || >>|
|Showing Results 1 - 10 of 33||