D-Glucose/D-Fructose 30 Test Kit Instructions. As the main sugars found in grape juice and wine, glucose and fructose can be determined enzymatically by using this spectrophotometric assay.

THIS PRODUCT REQUIRES THE USE OF A SPECTROPHOTOMETER

To ensure the integrity and long life of this perishable product we prefer to ship to you on Monday, Tuesday and Wednesday. This is because we don’t want it to suffer if it is delayed over a weekend. If you are sure we can send it safely later in the week then please advise us