Detection techniques for hydrogen

It is important to observe the pharmacokinetics in vivo for hydrogen bioresearch. Measuring the concentration of hydrogen is one of the key points in this study. Several methods have been developed to detect the concentration, including the gas chromatography technique, the rheophore detection technique, and the oxidimetry technique. The gas chromatography is the most classical, which is capable of quantitatively analyzing the minimum amount and even trace the amount of hydrogen. The rheophore detection measures a large scale from a minimum amount in the tissue to a high amount in the solution. The oxidimetry technique is usually used in the determination of the chemical composition of a hydrogen product. The advantages and disadvantages of these detection techniques are discussed with particular attention on the practical use.