500 Oooch and Kuzirian — Use of Sodium Paratungstatc. 



Table IV. 



Analysis of C. P. Nitrates of Commerce, after Drying. 



Nitrate 

 taken 

 grm. 



KNO, 



0-5000 

 0-5000 

 0-5000 

 0-5000 

 0-5000 



Sr(NO,), 



0-5000 

 05000 



Ba(N0 9 ), 

 0-5000 

 0-5000 



Na 10 W ls O4i 

 taken 

 grm. 



1.5 



1-5 

 1-5 

 1-5 

 1-5 



Loss on 



ignition 



grm. 



0-2668 

 0-2678 

 0-2674 

 0-2672 

 0-2675 



0-2544 

 0-2546 



0-2073 

 0-2076 



Theory for 

 N 2 6 6 

 grm. 



0-2670 

 0-2670 

 0-2670 

 0-2670 

 0-2670 



0-2543 

 0-2543 



0-2067 

 0-2067 



Error 

 grm. 



— 0-0002 

 + 0-0008 

 + 0-0004 

 + 0-0002 

 + 0-0005 



+ 0-0001 

 + 0-0003 



+ 0-0006 

 + 0-0009 



From the results of the experiments described above it is 

 obvious that sodium paratungstate, easily prepared and stable, 

 make6 an excellent flux for use in the rapid determination of 

 carbon dioxide and of nitrogen pentoxide by loss on ignition. 



