The haemometer is an absolute measuring system by graduation with g/dl reading. The graduated measuring tube is filled up to the bottom graduation line with hydrochloric acid. A quantity of 20 μl of blood is blown into the tube and water is added until the colour of the solution matches the colour of the test rods.

What is Sahil method?

Sahli's method is a way to determine the hemoglobin content in the blood. A device called Sahli's hemoglobinometer is used for this determination. ... Hydrochloric acid present in the device converts the hemoglobin into hematin acid which is then diluted so that the diluted hematin acid colour mathes with the comparator.

How do you take hemoglobin?

For a hemoglobin test, a member of your health care team takes a sample of blood by pricking your fingertip or inserting a needle into a vein in your arm. For infants, the sample may be obtained by pricking the heel. The blood sample is sent to a lab for analysis.