Quality Control of Cheese Using FT-NIR

The FT-NIR spectrometer MPA can determine a number of quality parameters in a range of cheese products that include cream, pre-processed, hard slicing and soft cheese within seconds. The near-infrared measurements are done in easy-to-fill disposable Petri dishes made of polystyrene.

In this way, using glass is avoided as this is needed as per the regulations. It is possible to sprinkle the grated cheese or smear the soft cheese into the Petri dish. With the help of a Si-diode detector, the sample in the MPA spectrometer is measured and virtually speaking, the complete sample depth is analyzed and scanned.

Optionally, the sample measurement can be done in reflection. Anyway, a sample rotator is used for enlargement of the scanned area and for improving the repeatability of the measurements. Based on the type of cheese, parameters such as pH value or salt content can also be defined with a single measurement. The results of calibration with different kinds of cheese are provided below. For dedicated product calibrations, the accuracy may improve significantly.

Calibration results:

  • Fat 7.5 - 35.0 ± 0.3 %
  • Dry Matter 27.5 - 64.5 ± 0.5 %

Bruker Optics has rich experience of over 30 years in the development and production of optical spectrometers.

Application Support

Engineers and scientists with a comprehensive knowledge of applications and instrumentation are a part of Bruker Optics. The company’s product specialists can assist with method development either in the lab or remotely. FT-NIR application scientists will help in selection and use of sampling accessories, selection of optical components and software operation. Customized instruction and support packages are provided to fit specific needs.

Service and Maintenance

Bruker spectrometers can offer several years of trouble- free operation, but in case a problem occur a network of Bruker companies and representatives around the world are ready to respond to the specific needs of customers. Professional installations and a high standard of post-delivery service are commitments Bruker makes to each of its customers.


Customer training courses are conducted regularly in order to benefit the FT-NIR instrument users. Both technical and software such as OPUS/IR, IDENT, QUANT practice seminars are offered. Customized on-site training is also available from the staff of FT-NIR specialists.

This information has been sourced, reviewed and adapted from materials provided by Bruker Optics.

For more information on this source, please visit Bruker Optics.


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