Activity Limited, Bury Road Industrial Estate, Ramsey, Cambridgeshire, PE26
1NF, United Kingdom
Tel: +44 (0)1487 813913 Fax: +44 (0)1487 812789
E-mail: email@example.com Web: www.opticalactivity.com
The NIR wavelength is set at about 880nm, operating to an optical density of 4.5 OD, which eliminates the need to clarify tarehouse and factory sugar samples using poisonous lead acetate.
The SacchAAr 880 offers the user a choice of measuring scales: I.S.S. (International Sugar Scale degrees Z), temperature corrected degrees Z and angular degrees at 589nm. When measuring at sodium yellow (589.44nm), if the sample transmission falls below 3%, the display shows the message: 'dark sample - switch to IR'.
Data entry is performed using a large and lockable alpha-numeric keypad with user-programmable built-in features including: Good Laboratory Practice (GLP) sample identification, temperature monitoring and user defined stability parameters.
Accuracy of the SacchAAr 880 is ± 0.001 Angular degrees between 0 to 10° and for the International Sugar Scale ± 0.01 degrees Z between 0 to 25°Z. Each reading takes on average only 25 seconds.
The SacchAAr 880 has a stable quartz halogen lamp light source, coupled with precise optical interference filters to select the sodium or IR wavelengths.
For calibration purposes, it does not matter if the quartz plate value is not known precisely at the IR wavelength, as the basic calibration check of the SacchAAr 880 is via a standard quartz plate at 589.44nm. Clear sugar samples, of arbitrary rotation, can then be used to check the NIR calibration. This patented feature enables the user to confirm calibration easily and at any time. Should a recalibration be necessary, Optical Activity can supply Quartz Control Plates to use as reference standards, all with UKAS Certificates of Calibration, to guarantee traceability.
The SacchAAr 880 uses any standard sample tube (with 30mm diameter collars) including a wide range of stainless steel or glass, single sample or flow tubes.
Sodium yellow and near infrared wavelengths
Sample temperature monitoring
Fast reading times
Full GLP capability
Choice of reading modes
No need for lead acetate