Accessory allowing an optical cell of 6-10,000 microm path for liquids and gases to be filled in vacuum and used under pressure.
An accessory for introducing liquid or gaseous samples without any contamination into an evacuated cell for optical spectrometry is described. The procedure for its use is similar to that of sample injection into a gas-liquid chromatograph, no glove box or glove bag being needed. Main benefits are the wide choice of size of the samples, their recoverability, safety, and a range of optical paths allowing to measure the absorbance of strongly absorbing liquids and gases, very dilute liquid solutions, and liquefied gases under moderate pressure. Short path spectra of gaseous water pressure standards consent quantification of water partial pressure measured in common gas cells.
Lunelli
Bruno
B
Istituto per lo Studio dei Materiali Nanostrutturati CNR, Sezione di Bologna (ISMN), 101 via P. Gobetti, I-40139 Bologna, Italy. b.lunelli@bo.ismn.cnr.it