Standard Reference Materials: Standard Quartz Cuvettes for High-Accuracy Spectrophotometry
- 1 September 1973
- journal article
- research article
- Published by Oxford University Press (OUP) in Clinical Chemistry
- Vol. 19 (9) , 1053-1057
- https://doi.org/10.1093/clinchem/19.9.1053
Abstract
Accurate knowledge of lightpath and parallelism of cuvettes used in spectrophotometry are indispensable parameters that must be determined when accurate transmittance measurements of liquid materials are considered. A description is given of the design and techniques developed at NBS for production of quartz cuvettes (SRM 932) having a nominal radiation pathlength of 10 mm ± 0.03 mm. For each cuvette, pathlength and parallelism are certified with an uncertainty of ±0.0005 mm. The method and instrumentation used to determine these parameters are also described.Keywords
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