Flourescence

A Label- and Enzyme-Free Fluorescent Method for the Rapid and Simple Detection of Hg2+ in Cigarettes Using G-Triplexes as the Signal Reporter

February 01, 2020

Spectroscopy

A novel method was developed for detecting Hg2+ in tobacco, with potential application to mercury detection in environmental water samples.

Review of New Spectroscopic Instrumentation 2019

May 01, 2019

Spectroscopy

Our annual review of products introduced at Pittcon or during the previous year

Total Reflection X-Ray Fluorescence Spectrometry for Metals and Nanoparticle Analysis

June 08, 2016

Total reflection x-ray fluorescence (TXRF) spectrometry is an energy-dispersive x-ray technique that is used for elemental and chemical analysis, and is especially suitable for small-sample analyses. Ursula Fittschen, an assistant professor at Washington State University, is working on elemental microscopy and micro analysis. She has been using TXRF to analyze stainless steel metal release, and also airborne silver nanoparticles (NPs) from fabrics. Here, she describes the advantages and challenges of this technique.

Harmful Algal Bloom Species and Identification Strategies

November 12, 2015

Spectroscopy

Application of simultaneous absorbance and fluorescence excitation-emission matrix (EEM) analysis to identify and classify freshwater planktonic algal species. Main foci were two major potentially toxic cyanobacterial species associated with algal bloom events in the Great Lakes.

High Throughput Chemical Screening with the LabSpec 6 MultiWell Module

May 14, 2015

Spectroscopy

LabSpec 6 MultiWell module and HORIBA Raman systems enable non-destructive analysis with high throughput screening using arrayed sampling devices, automated sample movement, autofocus devices, and automated data acquisition to acquire spectra from hundreds of samples sequentially.

Dye-Protein Binding Monitored in a Microliter Volume Using Time-Resolved Fluorescence

May 14, 2015

Spectroscopy

Time‐resolved Fluorescence can analyze potential health benefits from antioxidant activity of curcumin, found in turmeric. Curcuminoids, weakly fluorescent in aqueous solution, show quantum yield increases upon interaction with a protein, such as human serum albumin.

X-ray Diffraction and Fluorescence Spectroscopy Analysis of Sm3+ in Lithium Calcium Silicate

March 14, 2014

Spectroscopy

Here, Li2CaSiO4:Sm3+ reddish orange phosphors were synthesized by a solid-state reaction method and examined by spectroscopic methods.

Tracking Molecular Transport in Chromatographic Particles with Single-Molecule Fluorescence Imaging

May 18, 2012

Spectroscopy

An interview with Justin Cooper, winner of a 2011 FACSS Innovation Award. Part of a new podcast series presented in collaboration with the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), in connection with SciX 2012 ? the Great Scientific Exchange, the North American conference (39th Annual) of FACSS.

Tracking Unknown Intracellular Activity with Fluorescence Correlation Spectroscopy

January 01, 2012

Spectroscopy

The basic techniques of fluorescence correlation spectroscopy (FCS) are discussed as well as several applications, such as nanoparticle dispersion studies.

Measurement Techniques for Mercury: Which Approach Is Right for You?

September 01, 2011

Spectroscopy

The advantages and disadvantages of measuring mercury with cold vapor atomic absorption spectroscopy, cold vapor atomic fluorescence spectroscopy, and direct analysis by thermal decomposition are explained.