Measurement of xylose in cellulosic bioethanol

The YSI 2700 Select biochemistry analyser employs enzyme electrodes to measure xylose and glucose simultaneously

Measurement times may be reduced from half an hour to just one minute, with little or no sample preparation.

Simultaneous glucose and xylose concentrations can be measured during fermentation of complex matrices, (eg, pretreated corn stover), during the production of bioethanol.

A measurement can be made in about one minute with minimal preparation using the YSI 2700 Select.

YSI's enzyme electrode technology provides for specific glucose measurements in the range of 0.05 to 9.00g/l and for xylose measurements in the range of 0.5 to 30.0g/l (undiluted).

Measurements are virtually unaffected by colour, turbidity, density, pH, and most chemical substances.

When configured with YSI glucose oxidase and YSI pyranose oxidase membranes, the YSI 2700 analyser measures glucose and xylose with aspiration of just 13 microlitres of sample.

Some samples may need to be filtered; and for glucose concentrations that exceed 9g/l or xylose concentrations that exceed 30g/l, dilution of sample may be required.

Results are displayed using PC-based software.

The sample is automatically flushed from the electrode chamber within 30 seconds after the displayed results and the YSI 2700 is ready to measure the next sample.

Turn around time per sample is under two minutes.

The YSI 2700 can be used to monitor glucose and xylose to gain valuable information relevant to maximising ethanol production efficiency.

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