Description: The DU Series Spectrophotometer is a microprocessor- controlled spectrophotometer intended for use in quantitative and qualitative biological. The Beckman DU Spectrophotometer is an efficient stand alone system that comes with complementary accessories to produce accurate results. Beckman DU UV/Vis Scanning Spectrophotometer. This refurbished DU Spectrophotometer unit; PDF Manual; Mouse; Power cord.
|Published (Last):||18 December 2004|
|PDF File Size:||19.35 Mb|
|ePub File Size:||6.31 Mb|
|Price:||Free* [*Free Regsitration Required]|
Spectroscopic techniques were rarely taught in chemistry classes and were beckmaan to most practicing chemists. Item s are sold-as-is as shown in pictures above. Science in the twentieth century. Three Model C instruments were then built, improving the instrument’s wavelength resolution.
Arnold Orville Beckman — “.
Replied to gr’s post on November 9 th Optical principles and technology for engineers. The systems comes with a inch VGA flat panel color monitor.
Retrieved 20 August Freight – Read the item description or contact the seller for details See details. Image not available Photos not available for this variation. As advertised in the News Edition of the American Chemical Society, the Beckman Spectrophotometer used an autocollimating quartz crystal prism for a monochromator, capable of covering a range from the ultraviolet millimicrons to the infrared millimicronswith a nominal bandwidth of 2 millimicrons or less for most of its spectral range.
Determining quantitative concentrations of those components in the sample involved further steps. Sell now – Have one to sell? Retrieved 30 August It had a moving chart recorder to plot results, with red, green and black dots. The DU spectrophotometer was extensively used in the mass production of penicillin. Retrieved 8 September This model of spectrophotometer enabled scientists to easily examine and identify a given substance based on its absorption spectrumthe pattern of light absorbed at different wavelengths.
In Berl, Walter G. Please feel free to ask question s if you have any.
Tungsten lamps were useful in the visible light range but gave poor coverage in the ultraviolet range. Thank you for your time and Business. Large, high speectrophotometer quality quartz suitable for creating prisms was difficult to obtain. Resume making your offerif the page does not update immediately.
Equipment Information – MSU Pharmacology & Toxicology Facilities
Archived from the original PDF on 26 March The back surface of the prism is aluminized so that light refracted at the first surface is reflected back through the prism, undergoing further refraction as it emerges from the prism.
I reserve the right to reject item after inspection i. The default setting will overlay each scan on the spectrum visual display. He further demonstrated that the relative amounts of guanine, cytosine, adenine and thymine varied between species.
USA Customers Items are shipped within two business days after payment is received. Non-volatile memory is standard for storage of methods and data. Journal of Dairy Science.
The entrance mirror deflects the light through the entrance slit and into the monochromator to the collimating mirror. When they turned down the opportunity, National Technical Laboratories designed its spectrophltometer optical system, including both a control mechanism and a quartz prism. Biological molecules, including proteins and nucleic acidsabsorb light energy in both the ultraviolet and visible range. Approximately 30, DU spectrophotometers were manufactured and sold between and Back to home page Return to top.
Subject to credit beckma. Spectroscopic methods for observing the absorption of electromagnetic radiation in the visible spectrum were known as early as the s.