Diabetes is detected using …. by testing urine of patients

Benedict solution contains CuSO₄, Na₂CO₃ and sodium citrate. This permits formation of a complex, which lowers the concentration of Cu (II) ions to such an extent that it does not permit the precipitation of insoluble Cu( OH)₂. Benedict solution is more stable than Fehling's solution and is not affected by substance like creatine and uric acid present in urine. Hence it is preferred to detect glucose in urine.