Apple Freshness Comparison

Application

Measuring ripeness and firmness of fresh apples.

  

Problem

This processor did not have a way to objectively or quantitatively measure the texture of their products. Current methods for evaluating ripeness and firmness of apples were done through sensory panel testing and use of a penetrometer which both gave inconsistent and unreliable data.

 

Solution

Apple firmness is mesured from the peak penetrometer force

Testing was performed with a TMS-Pro Texture Analyzer, a 500N load cell and a 5mm diameter steel cylinder probe. The apples were held in place with the TMS spherical sample holder. Taking into account that all apples are not identical in shape/size, the program was written to first start at zero then run down at 50mm/min until it sensed the top of the apple. Next, run into the apple 15mm at 250mm/min, then return to zero. The graph shows the curves from 3 types of apples in which 2 samples of each type were ran. The initial upward slope is the cylinder probe penetrating the apple. The peak represents when the outside skin is ruptured. The rest of the curve represents the probe penetrating through the flesh of the apple. This graph shows the Fuji and Granny Smith apples were similar in firmness, with Granny Smith being slightly firmer and the Golden Delicious apples being the least firm.

Trusted by customers across the world

Nestle purchased a texture system from Food Technology Corporation in 2006. Since then I have recommended the texture system to several vendors in North and Central America. Staff at FTC was able to develop a simple training manual and procedure for the texture system allowing easy training in short period of time.

From purchasing of equipment through to installation and start-up, the level of personal care and service was remarkable. Shirl Lakeway and his staff at Food Technology Corporation are patient and understanding, and are always at our disposal for any assistance. Since we bought the equipment we have had no problems and feel very secure knowing that we can count on FTC for their support and service.

Dr Mawele Shamaila, Nestle - USA
http://www.nestleusa.com/

Service, equipment and people are all first class with Food Technology Corporation.

Questions and problems are handled quickly, which is something that is hard to find in today’s business environment.

 

 

 

David Smith, Riviana Foods Inc.
http://www.riviana.com/

Excellent customer service. Consistently followed up and offered help without asking. Relatively low priced - provides good value. 

Easy to switch different load cells. Used it for 5 lab sessions for 68 students this semester and performed well.

 

 

Professor Jeyam Subbiah, University of Nebraska
https://nebraska.edu/