Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 1 de 1
Filter
Add more filters










Database
Language
Publication year range
1.
Rev Sci Instrum ; 93(3): 033001, 2022 Mar 01.
Article in English | MEDLINE | ID: mdl-35364971

ABSTRACT

Alternating acquisition of background and sample spectra is often employed in conventional Fourier-transform infrared spectroscopy or ultraviolet-visible spectroscopy for accurate background subtraction. For example, for solvent background correction, typically a spectrum of a cuvette with solvent is measured and subtracted from a spectrum of a cuvette with solvent and solute. Ultrafast spectroscopies, though, come with many peculiarities that make the collection of well-matched, subtractable background and sample spectra challenging. Here, we present a demountable split-sample cell in combination with a modified Lissajous scanner to overcome these challenges. It allows for quasi-simultaneous measurements of background and sample spectra, mitigating the effects of drifts of the setup and maintaining the beam and sample geometry when swapping between background and sample measurements. The cell is moving between subsequent laser shots to refresh the excited sample volume. With less than 45 µl of solution for 150 µm optical thickness, sample usage is economical. Cell assembly is a key step and covered in an illustrated protocol.


Subject(s)
Artifacts , Lasers , Spectroscopy, Fourier Transform Infrared/methods
SELECTION OF CITATIONS
SEARCH DETAIL
...