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The polarimeter models P8000 and P8100 are the right choice for all applications where sample temperature control for high-precision measurements is not absolutely necessary. The devices are suitable for nearly all samples as the parts that come in contact with the sample are chemical resistant. The P8000 and P8100 are recommended for all basic applications. Instead of a temperature control, the temperature can be compensated according to ICUMSA. That allows you to take measurements at any temperature; the results will then be converted to the desired temperature. In addition, the international sugar scale has been predefined on our devices, and the initial weight is taken into account for the conversion into the specific rotation.
The P8000 and P8100 are especially recommended in case of a high sample throughput in the sugar industry.
A comprehensive overview of typical applications with the polarimeters of the P8000 series can be found in our campus article on polarimeter applications.
A big advantage of normalized measurements is the comparability of the measurement results. In many international standards and guidelines, polarimeters are recommended for specific measurement tasks as suitable measuring instruments. The requirements for the measuring devices, such as measuring accuracy and measuring temperature, are dependent on the respective measuring task and defined in each standard. We have compiled for you an overview of all known standards and guidelines, which refer to polarimetry.
Polarimeter Standards (PDF, 83 KB)
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Many biologically important substances such as amino acids, sugars, enzymes or receptors are chiral compounds and have the ability to rotate linear-polarized light. Almost all natural amino acids rotate linearly polarized light to the left, whereas natural sugars (eg D-glucose) almost exclusively turn right. These substances have the same physical properties as density, melting point, boiling point or IR spectrum except for their optical activity. Depending on the direction of rotation, chiral substances can have very different physiological effects on living organisms. Therefore, measurement of optical purity with a polarimeter is an important quality criterion in the production of chiral drugs in the pharmaceutical industry. Due to the proportionality of the rotation value α and the concentration c, it is possible to carry out quantitative content determination of sugar solutions in the sugar processing industry (saccharimetry).
A high-quality optics, intelligent evaluation logarithms, LEDs with different wavelengths and a consistent measuring accuracy over the entire measuring range are available for the quantification and characterization of all optically active substances.
In the following table we have compiled an overview of frequent samples from our customers. Most samples were measured at standard measurement conditions (20 ° C, λ = 589 nm). Deviations are indicated. The measurements given are not specifications.
Polarimeter samples and their optical rotation (PDF, 122 KB)
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Get in contact with us, we will assist you in choosing a suitable polarimeter.
| P8000 | P8100 | |
|---|---|---|
| MEASUREMENT DATA | ||
| SCALES | Optical rotation [°] Int. sugar scale [°Z] Concentration [g/100 ml] Spec. rotation User-defined | |
| MEASUREMENT RANGE | ±90° ±259 °Z | |
| MEASUREMENT ACCURACY | ±0.003° ±0.01 °Z | ±0.002° ±0.01 °Z |
| RESOLUTION | 0.001° 0.01 °Z | |
| MEASUREMENT PERIOD ±90° | Approx. 1 s | |
| LIGHT SOURCE | 1 LED with filter | |
| WAVELENGTH | 589 nm | |
| TEMPERATURE DATA | ||
| TEMPERATURE CONTROL | Can be retrofitted (requires Circulation Thermostat PT31 or PT80 sample chamber bushing P8020 and temperature-controlled measurement tube PRG-100-ET) | |
| TEMPERATURE MEASUREMENT | With temperature probe PRT-E or PRT-T | |
| TEMPERATURE MEASUREMENT RANGE | 0–99.9 °C | |
| TEMPERATURE MEASUREMENT RESOLUTION | 0.1 °C | |
| TEMPERATURE MEASUREMENT ACCURACY | ±0.1 °C | |