Study on the measurment of organic phosphorus in sodium bicarbonate extracts

Whether there were losses of P during digestion by volatilisation of o rthophosphate o r formation of metaphosphate and pyrophosphate w as studied .The necessity of hydrolysis and additon of saturated M gCl2 w as discussed .The quantities of inorg anic phospho rus after diges- tion and hy drolysis of py rophosphate and metaphosphate , o rganic phosphate , tw o extracts and inorg anic phosphate containing glucose w ere measured .The results show ed that hydroly sis of pyrophosphate and metaphosphate was enhanced during digestion .There were no P losses dur- ing digestion .It' s not necessary to add saturated M gCl2 before digestion and hy drolyze after di- gestion.