[Method for determination of creatine in minced meat].

A rather version of picrate method for determination of creatine in minced meat is proposed. It is suitable for application in laboratories of meat-processing plants.

[Jaffe color test-based microtechnique for determination of milk lactose].

The picric acid reaction (Jaffe test) that is widely used in clinical biochemical practice to determine creatinine has proven to be suitable for the assay of lactose in milk samples. The reaction conditions (picric acid concentration, sample heating time, etc.) were examined to optimize this method.