CDOM fluorometer Aqualog®

for environmental analysisfor the food industry

The HORIBA Aqualog is a unique optical spectrometer that is the gold standard in environmental water research around the world for the study of color dissolved organic matter (CDOM). The Aqualog was invented to meet the needs of environmental water researchers around the world studying CDOM using fluorescence spectroscopy. At that time researchers were using scanning spectrofluorometers to slowly acquire a three dimensional matrix of the fluorescence excitation and fluorescence emission spectra, called an Excitation Emission Matrix (EEM). The EEM provides a fingerprint for studying dissolved organic matter, however it took up to an hour to collect a single EEM profile, tying the researcher to the lab bench for the entire day. The HORIBA Aqualog vastly improves the speed with which fluorescence EEMs are collected, dramatically increase the dynamic range across which EEM fingerprints are quantitative, and simultaneously acquires absorbance spectra for absorbance and color analysis of non-fluorescent molecules present in water. We call this technique that the Aqualog employs, an Absorbance-Transmission Excitation Emission Matrix, or A-TEEMTM. Traditional scanning spectrofluorometers have been used to collect a molecular fingerprint, in the form of a fluorescence excitation emission matrix, or EEM. Sometimes also referred to as 3D Fluorescence, an EEM is a three-dimensional data set of fluorescence excitation wavelength versus fluorescence emission wavelength versus fluorescence intensity. With a scanning spectrofluorometer,