Determination of water.

The complexity of the subject and the problems involved in the estimation of water in the many materials required to be tested are explained. The various methods available are classified, their techniques summarized, and their applications and limitations indicated. In many materials the determination of absolute moisture is impossible and a compromise must be accepted. Trade and industry require rapid results for many processes and products, and optical or electronic methods are increasingly used in conjunction with reference methods. For official purposes the method of determination must be agreed and stated in detail. More progress in international standardization is very desirable.