Texture Analysis in Action: the Multiple Chip Rig

A penetration test could well be considered the most simple of all tests; as the size of the probe surface area is constant, this often means that the sample size does not need to be carefully controlled unlike compression testing.

However, when faced with a non-homogeneous product penetration is highly compromised as a smaller surface area for measurement is also more sensitive to variations in sample structure and low reproduceability and misleading data is obtained.

Results may show a wide variance between maximum and minimum forces depending on whether the probe meets with, for example, an air pocket, hard particle or internal structure variation.

The MULTIPLE CHIP RIG (A/MC)  measures the force obtained by the penetration of a multiple sample of chips (known in some countries as French fries). 

Up to 10 chips can be tested at any one time and the rig ensures that each chip is completely penetrated by a 2mm diameter probe.

The probe head has a fast release adapter to enable the probe to be rapidly cleaned and relocated in the same position and has three detent positions to allow testing at three locations along the sample lengths. Two adjustable stainless steel rods are used to hold the samples in position on the sample holder.

Firmness measurement of French fries
using the Multiple Chip Rig

A Selection of Published Papers using this fixture/principle:

MOYANO, P. C., TRONCOSO, E. & PEDRESCHI, F. (2007). Modeling Texture Kinetics during Thermal Processing of Potato Products. Journal of Food Science, 72 (2), 102-107.

PEDRESCHI, F. & MOYANO, P. (2005). Effect of pre-drying on texture and oil uptake of potato chips. LWT, 38, 599-604.

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We can design and manufacture probes or fixtures for the TA.XTplus texture analyser that are bespoke to your sample and its specific measurement.

Once your measurement is performed, our expertise in its graphical interpretation is unparalleled. Not only can we develop the most suitable and accurate method for the testing of your sample, but we can also prepare analysis procedures that obtain the desired parameters from your curve and drop them into a spreadsheet or report designed around your requirements.

For more information on how to measure texture, please visit the Texture Analysis Properties section on our website.

The TA.XTplus texture analyser is part of a family of texture analysis instruments and equipment from Stable Micro Systems. An extensive portfolio of specialist attachments is available to measure and analyse the textural properties of a huge range of food products. Our technical experts can also custom design instrument fixtures according to individual specifications.

No-one understands texture analysis like we do!

To discuss your specific test requirements click here...