Haemoglobin assay

1. A kit for a glycated haemoglobin assay, said kit comprising:

a porous membrane capable of retaining precipitated haemoglobin;

a first reagent comprising zinc ions in aqueous basic solution or comprising a water soluble zinc compound; and

a second reagent comprising a chromophore-boronic acid conjugate;

wherein at least one of the first and second reagents further comprises a surfactant capable of lysing erythrocytes, said second reagent if liquid is acidic and the boronic acid conjugate and the zinc are present in separate reagents in the assay kit.

2. A kit as claimed in claim 1 further comprising an aqueous washing agent.

3. A kit as claimed in claim 1 wherein said first reagent comprises zinc ions in aqueous basic solution.

4. A kit as claimed in claim 1 wherein said second reagent contains a surfactant.

5. A kit as claimed in claim 1 wherein said second reagent is a dried material.

6. A kit as claimed in claim 1 wherein said first reagent contains a surfactant.

7. A kit as claimed in claim 1 wherein at least one of said first and second reagents contains albumin.

8. A kit as claimed in claim 1 wherein one of said first and second reagents is in liquid form in a container and the other of said first and second reagents is in dried form coated on a stopper applicable to said container.

9. A kit as claimed in claim 1 wherein said second reagent is liquid and said first and second reagents are disposed in a two chamber container with a frangible membrane separating the chambers.

10. A kit as claimed in claim 8 wherein the reagent coated on the stopper is the second reagent and contains albumin.