AMMONIA COEFFICIENT OF URINES. 



161 



I have made over two hundred determinations to test the accuracy of 

 this method of estimating the ammonia coefficient, for the greater part 

 using known quantities of urea and ammonium chloride. A series of 

 these results is given below in Table III. In the determination of the 

 ammonia coefficient in the urines listed, the figure given under the 

 heading "Calculated" represents the value obtained by determining total 

 nitrogen by the Kjeldahl method and the ammoniacal nitrogen by 

 distillation with powdered magnesia accordiag to the standard method. 



Table III. 



Taken. 



0.08 gram urea in 5 cc. of water 



0.008 gram NH4CI in 5 ec. ol water., 



0.08 gram urea in 5 cc. of water 



O.OIS gram NU4CI in 5 cc. of water. 



0.1 gram urea in 5 cc. of water 



0-05 gram NH4CI in 5 cc. of water 



0.1 gram urea in 5 cc. of water 



025 gram NH4CI in 5 cc. of water _ 



0.1 gram urea in 5 cc. of water 



0.03 gram NH4CI in 5 cc. of water.. 



0.1 gram urea in 5 cc. of water 



0.04 gram NH4CI in 5 cc. of water .. 



0.1 gram urea in 5 cc. of water 



0.01 gram NH4CI in 5 cc. of water.. 



0.1 gram urua in 5 cc. of water 



0.01 gram NH4CI in 5 cc. of water .. 



0.1 gram urea in 5 cc. of water 



0.05 gram NH4CI in 5 cc. of water .. 



0.1 gram urea in 5 cc. of water 



0.06 gram NH4CI in 5 cc. of water __ 



0.1 gram urea in 5 cc. of water 



0.07 gram NH4CI in 5 cc. of water .. 



0.1 gram urea in 5 cc. of water 



0.08 gram NH4CI in .5 cc. of water.. 



0.1 gram urea in 5 cc. of water 



0.09 gram NH4CI in 5 cc. of water .. 



0.1 gram urea in 5 cc. of water 



0.1 gram NH4CI in 5 cc. of water ___ 



0.1 gram urea in 5 cc. of water 



0.1 gram NH4CI in 5 cc. of water 



1 gram urea in 5 cc. of water 



0.1 gram NH4CI in 5 cc. of water... 



Fresh normal urine 5 cc 



Urine very much decomposed, 5 cc 



Fresh normal urine 5 cc 



Do 



Urine 24 hours' old, 5 cc 



Urine 72 hours' old, 5 cc 



Number of 

 cc. of gas 



with 



mercuric 



nitrate 



reagent. 



65.0 

 61.0 

 75.0 

 77.0 

 77.5 

 77.2 

 78.1 

 76.2 

 76.0 

 76.8 

 76.8 

 77.2 

 77.0 

 77.5 

 77.5 



76.1 



38.0 

 20.3 

 64.2 

 69.4 

 57.2 

 52.4 



Number of 

 cc. of gas 

 with alka- 

 line hypo- 

 bromite. 



33.7 

 33.5 

 47.5 

 43.0 

 44.8 

 45.9 

 40.3 

 39.1 

 47.8 

 50.0 

 52.8 

 54.0 

 57.0 

 59.6 

 60.0 



17.8 

 17.9 

 32.8 

 35.4 

 30.3 

 32.1 



Ammonia 



coefficient 



found. 



5.9 

 10.4 

 21.6 

 12.8 

 14.7 

 18.1 

 .5.45 



5.0 

 22.1 

 25.0 

 29.0 

 30.4 

 33.6 

 35.8 

 36.4 



37.5 



4.3 

 44.4 

 4.5 

 4.5 

 7.6 

 20.6 



Calcu- 

 lated. 



5.6 

 10.6 

 23.5 

 12.4 

 14.2 

 18.3 

 5.6 

 5.6 

 23.5 

 24.9 

 28.1 

 31.0 

 33.4 

 35.2 

 35.2 



35.2 



4.1 

 45.9 

 4.1 

 4.1 

 7.2 

 19.9 



