A thermoelectrically stabilized aluminium acoustic trap combined with attenuated total reflection infrared spectroscopy for detection of Escherichia coli in water

Abstract

Acoustic trapping is a non-contact particle manipulation method that holds great potential for performing automated assays. We demonstrate an aluminium acoustic trap in combination with attenuated total reflection Fourier-transform infrared...

Metal-Organic Frameworks Combined with Mid-Infrared Spectroscopy for the Trace Analysis of Phosphates in Water

“…This geometry resulted in 14 active bounces (N) at a total effective pathlength (d e,tot = d e N) of 18.1 µm at 1100 cm -1 (n dia = 2.4, n sample = n water = 1.33) and a depth of penetration (d p ) of 1 µm [47]. The measurement setup comprised a custom built ATR mount and an aluminium flow cell previously reported by Freitag et al [48] and Baumgartner et al [23], which allowed the integration into the sample compartment of a Vertex 70 v FTIR spectrometer (Bruker, Germany). Spectra were collected with OPUS 8.1 software using a spectral resolution of 4 cm -1 , 32 scans per spectrum (double sided, forward-backward acquisition mode).…”

“…2. It is modified from the SIA system previously reported by Freitag et al [48], and consisted of a 10-port selection valve (VICI, Switzerland), as well as a Cavro XC syringe pump (Tecan, Switzerland) equipped with a 500 µL glass syringe (Tecan, Switzerland). The components were connected with PTFE tubing (VICI, Switzerland, O.D.…”

Direct CO2 Activation and Conversion to Ethanol via Reactive Oxygen Species

“…The setup has been incorporated into a Fourier transform IR (FT-IR) spectrometer and was reported before. [45] Samples of the liquid headspace of the immobilized catalyst were taken and injecting it into the 20 μL flowcell utilizing a sequential injection analysis (SIA) system. For each measurement a total of 100 μL sample was injected.…”