USE OF THE OXIMETER-539 WTW, EQUIPPED WITH A SENSOR TRIOXMATIC-300, FOR THE FUNCTIONAL-ANALYSIS OF DILUTE-SOLUTIONS OF HUMAN HB-A

Dissociation curves for oxygen of dilute samples of human adult Db-A w ere evaluated on this occasion, by using the Oximeter-539 WTW with its sensor, and a suitable spectrophotometer, At this purpose, Db samples were desaturated in oxygen upon given experimental conditions, by bub bling pure nitrogen in them, and their re-oxigenation in air was follo wed, step by step, by multiple oximetries, In addition, all the spectr ophotometric measurements of the saturation of Hb-O-2%, corresponding to each individual oximetry, were carried out paralley but separately, Dilution of Hb-A was maintained at 0.1 mM in heme, The p50 at pH 7.3 was 4.435+/-0.299 Torr, with the n-value of 2.7+/-0.2; Bohr effect was -0.55+/-0.08, within a pH range between 6.8, 7.3 and 7.8, whereas chl oride and DPG effects at pH 7.3 (the most useful value) were 0.42+/-0. 044 and 0.453+/-0.0187 respectively, In conclusion, these results are similar to those obtained with automated procedures, upon comparable e xperimental conditions, but do not require expensive and sophisticated instruments, Such a technique could be very useful in the hemoglobino pathies, which are common in Italy, and it could be easily adapted to perform comparative studies on animal hemoglobins not far from human s pecies.