Test means, such as a composition, a test device, method of making the test device and process for determining glucose in a body fluid sample are disclosed. More particularly, the contemplated test means comprises glucose oxidase, a peroxidatively active substance, such as peroxidase, and a 3,3',5,5'-tetraalkylbenzidine...http://www.google.com.au/patents/US4273868?utm_source=gb-gplus-sharePatent US4273868 - Color stable glucose test
