Direct and rapid measurement of hydrogen peroxide in human blood using a microfluidic device

, and detection time of 15 min; the device is amenable to the real-time measurement of [Formula: see text] in the patient's blood. Using the linear correlation obtained with known quantities of [Formula: see text], the endogenous [Formula: see text] concentration in the blood of healthy individuals is found to be in the range of 0.8-6 µM. The availability of this device at the point of care will have relevance in understanding the role of [Formula: see text] in health and disease.