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An optical free piston cell (a modified le Noble and Schlott type optical cell) is described for use in spectrophotometric study under high pressure. The cell consists of a disk, a cylinder, and a free piston, which are made of quartz and are mounted within a stainless‐steel holder. A small amount of sample solution (∼0.6 cm3), which only contacts with quartz, is required for measurements. The path length is fixed (1.2 cm) at ambient pressure, but is self‐adjusting at elevated pressure so that no compressibility corrections are necessary.
Published in:
Review of Scientific Instruments
(Volume:65
,
Issue:
2
)
Date of Publication: Feb 1994