- Designed for pharmaceutical applications
- Peltier system for automatic temperature control
- 21 CFR part 11 ready
- Energy-saving durable LED’s
The new VariPol series from Schmidt + Haensch offers a portfolio of polarimeters from a compact basic version to a high-end research instrument that has been specially developed for pharmaceutical applications.
The series offers a Peltier system for automatic temperature control. All models are 21 CFR part 11 ready and are equipped with energy-saving, long-life LEDs.
The resolution of all VariPol models fully complies with the provisions of the European and American Pharmacopoeia. The measured values are documented in accordance with GLP/GMP when the data is output on a PC, printer or in a LIMS. In addition to three USB, one serial and one LAN interface, all polarimeters can be expanded with additional ModBus, CanBUs or W-LAN interfaces.
Validation / calibration
With circular polarimeters, the wavelength can change in the course of time due to aging. Therefore, regular testing and, if necessary, recalibration of the polarimeter is necessary. Sucrose solutions or so-called quartz control plates (QCP) can be used as test and calibration standards. This is possible because the optical properties (ORD) of quartz and sucrose solutions are almost identical.
Quartz control plates (QCP) are long-term stable test standards for polarimeters and are recommended by SCHMIDT + HAENSCH as test standards. For this purpose, 0.4 to 1.6 mm thin quartz disks are ground with the highest precision perpendicular to the axes and plane-parallel and installed in a stainless steel tube without tension. The sample space of SCHMIDT + HAENSCH polarimeters allows both the vertical displacement of quartz control plates and the free rotation (± 360 °) around its own axis. Rotation is the only way to determine whether the plates are tension-free and enable the polarimeter to be checked in accordance with the implementation regulations (SPS) of international standards such as ICUMSA and OIML.
|Measurement Scales||° Optical rotation, ° Specific rotation, °Z International Sugar Scale, % Concentration (g/mL, g/100mL, g/L), further
scales freely definable
|Measuring range||± 89.9°|
|Resolution||0.005° (Varipol C)
0.001° (Varipol B)
|Precision||± 0.01° * (VariPol C)
± 0.005° * (VariPol B)
|Repeatability||± 0.01° (VariPol C)
± 0.005° (VariPol B)
|Sensitivity||Up to OD 3|
|Wavelength||1 or 2 wavelengths fixed, standard 589 nm, also available 365, 405, 436, 546, 578|
|Measuring time||6 to 8 sec. over the entire measuring range|
|Measuring tubes||Up to 100 mm length; standard tubes microtubes, compact tubes Material: glass, stainless steel, titan|
|Temperature measurement||Pt1000 sensor (device) / NTC sensor (Quartz control plates and tubes)|
|Temperature range sample temperature||10°C to 40°C|
|Precision||± 0.1°C *|
|Peltier temp. regulation of the sample room||18°C to 25°C (VariPol C)
10°C to 40°C (VariPol B)
|Light source||LED, interference filter|
|Display||None, 5″ or 7″ Touchscreen, 800 x 480 Pixel|
|Operation||Touchscreen**, Keyboard***, Mouse***, Barcode Reader***, Remote via PC/Tablet/Smartphone***|
|Interfaces / Communication||Ethernet 10/100/1000, RS232, SH connector, USB, WLAN**, Modbus**, Canbus**, Profibus**|
|Conformity||International Pharmacopoeia, OIML, ICUMSA, Australian Standard K157|
|Dimensions||430 x 300 x 160 mm (w x d x h, without display)|
|Highlights||Basic Polarimeter especially designed for pharmaceutical applications; Modularity; Fast measuring; Peltier system for automatic temperature control; easy to calibrate; constant precision over the whole measuring range, 21 CFR part 11 ready; energy saving durable LEDs; ELN; LIMS ready|
* Standard conditions
*** Not included in delivery