Standard reference materials: standard quartz cuvettes for high-accuracy spectrophotometry.

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.

[1]  K. Mielenz.  Physical Parameters in High-Accuracy Spectrophotometry. , 1972, Journal of Research of the National Bureau of Standards Section A Physics and Chemistry.

[2]  E. Deardorff,et al.  Liquid Absorbance Standards. , 1972, Journal of research of the National Bureau of Standards. Section A, Physics and chemistry.

[3]  R Mavrodineanu,et al.  An Accurate Spectrophotometer for Measuring the Transmittance of Solid and Liquid Materials. , 1972, Journal of Research of the National Bureau of Standards Section A Physics and Chemistry.

[4]  Robert W Burnett,et al.  Accurate Measurement of Molar Absorptivities. , 1972, Journal of research of the National Bureau of Standards. Section A, Physics and chemistry.