During fermentation of grape juice, yeasts require nitrogen as a nutrient, with a portion provided by primary amino acids. This test kit is suitable for measuring the primary amino acid nitrogen content in grape juice and non-fermenting must.

The Yeast Available Nitrogen (YAN) content of the juice can be determined by adding this PAAN content to the Ammonia Nitrogen (AN) content.

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 accordingly.