Observations on sahli's haemoglobinometer

Abstract

1. A standard technique for estimating the hemoglobin by Sahli's method is given. 2. The need for checking hæmoglobin colorimeters and all accessories is stressed. 3. When serial readings are being made it is essential that they should be undertaken by a single observer using the same instruments and a standard method. In view of the diurnal variations which are known to occur it is also important that the estimations should be carried out at approximately the same hour of the day. Under these conditions the accuracy of the Sahli method is confirmed. 4. Certain sources of error in the Sahli method are mentioned and an attempt is made to assess their importance. Standardization and careful checking of the instruments would contribute greatly to the reliability of the test. I desire to thank Professor Noah Morris for his helpful criticism while carrying out this work.