The quantification of glucose and maltose in cereal-based samples like oat and rice drinks is challenging because high concentrations of maltotriose and higher glucose oligomers are present which behave chemically similar to maltose. 

The DirectSens® Maltose & Glucose Kit is highly robust against cross sensitivities to maltotriose and other sugars. The following concentrations do not interfere with the measurements: 

• Maltotriose: 60 g/L 

• Sucrose: 60 g/L 

• Fructose: 60 g/L 

• Lactose: 60 g/L 
• Raffinose: 10 g/L
   

The calibration of the sensors is done by experts in the factory which enables reliable and accurate measurements and saves working time in the lab.  

Fig. 1 and Fig. 2 show the measurement results for glucose and maltose in comparison to HPLC measurement results for different commercial oat and rice drink samples including flavored variants (cocoa, cocos, pumpkin seed, hemp protein). 

The user is led by an intuitive software through a simple measurement procedure. After an initial training on how to use a pipette and how to perform the measurement, anyone can do it – chemical expertise is not needed. Calibration work is not necessary – the sensors come readily factory calibrated. 

After preparation of the stock dilution with deionized water, the whole measurement protocol can be carried out in approximately 12 minutes. 

No lab environment and no lab personnel are required. Just find any space that is large enough to do the dilution and the measurement and ensure that the room temperature stays between 20 – 24 °C (68 – 75 °F).  

After a simple dilution with deionized water, the protocol can be carried out in about 12 minutes. 

A professional QC operation includes periodic check-ups for the system performance. The standard delivery content of each DirectSens® Biosensor setup includes everything that is needed to do this quickly, reliably, easily and fully tracable including electronic reporting. Two check up procedures are supported:  

1. Measurement performance check: Each Maltose & Glucose Kit comes with a vial of positive control that can be used to check if the measurement is providing valid results for both maltose and glucose.  

1. Reader performance check: The reader kit includes an electronic reader check device that can be used for periodical checks of the reader performance.   

The reader is maintenance free. If sample liquid accidentally enters the biosensor slot, you can exchange the front part of the reader easily and quickly without the need for service people coming to your place. It´s a simple one-screw operation that anyone can do.