Analysis of Aqueous Solutions

Infrared spectroscopy and X-ray fluorescence can be used for the analysis of aqueous solutions.

IR-Spectroscopy is not limited to gases, solid materials and pure liquids but also facilitates the measurement of solutes in aqueous media. Though, due to the strong and temperature dependent absorption of water, the usage of conventional IR-transmission and ATR accessories is not very suitable for the analysis in water.

The CONFOCHECK is a dedicated FT-IR system for the fast, easy and sensitive analysis of aqueous samples. Using this system, preparing, measuring and evaluating any aqueous sample takes typically about 1 minute.

On the basis of an IR spectrum, the sample can be identified and its components can be quantified. By comparing the sample spectrum with the spectra of a reference library, the sample in question can be identified unambiguously.

Moreover, sample compositions that deviate from the reference or sample contaminations can be detected and evaluated.

The spectra of two aqueous culture media samples were compared with the reference spectra of different batches of a culture medium product. The sample spectrum on the left shows a good conformity with the references. Due to a faulty sample composition the

The elemental composition of aqueous solutions can be determined by total reflection X-ray fluorescence (TXRF) analysis. Samples can be analyzed without any pretreatment directly after pipetting and drying on a sample carrier. Elements from sodium to uranium are quantified simultaneously in a concentration range from 1% down to 100 ppt.