X, A, 1 



Pratt: Papain 



9 



No. Jf. Ceylon 'papain. — I obtained this sample from another 

 prominent dealer in Colombo. It closely resembled the preceding 

 in appearance, and was considered as unadulterated. The analy- 

 sis is shown in Table V. 



Table V. — Analysis of Ceylon papain, sample U. 



















I 

 Parts of 



No. of 

 flask. 



Milk. 



Water. 



Papain 

 solution. 



Papain. 



Protein 

 undi- 

 gested. 



Protein 

 digested. 



Protein 

 digested. 



protein 

 digested 

 by 1 part 



papain. 





ec. 



ce. 



cc. 



mg. 



ing. 



mg. 



Per cent. 





1 



26 



23 



2 



10 



1,033 



96 



8.5 



9.6 



2 



25 



21 



4 



20 



943 



186 



16.5 



9.3 



3 



25 



19 



6 



30 



877 



252 



22.4 



8.4 



4 



25 



17 



8 



40 



802 



327 



29.0 



8.2 



5 



25 



15 



10 



50 



759 



370 



32.8 



7.4 



6 



25 



13 



12 



60 



717 



412 



36.5 



6.9 



7 



25 



11 



14 



70 



688 



441 



39.1 



6.3 



8 



25 



9 



16 



80 



645 



484 



42.8 



6.1 



9 



25 



7 



18 



90 



612 



517 



45.9 



5.7 



10 



25 



5 



20 



100 



589 



540 



48.0 



5.4 



Protein in blank = 1,129 milligrams. 



Starch absent. 



Acidity of papain solution as HC1= 0.004 per cent. 



No. 5. Ceylon papain. — This sample was from the same source 

 as No. 4 and is similar in appearance, but it contains starch as 

 adulterant. The analysis is shown in Tables VI and VII. 



Table VI. — Analysis of Ceylon papain, sample 5. 



















Parts of 



No. of 

 flask. 



Milk. 



Water. 



Papain 

 solution. 



Papain. 



Protein 

 undi- 

 gested. 



Protein 

 digested. 



Protein 

 digested. 



protein 

 digested 

 by 1 part 



















papain. 





ce. 



cc. 



ec. 



mg. 



mg. 



mg. 



Per cent. 





1 



25 



23 



2 



10 



1,156 



57 



4.7 



5.7 



2 



25 



21 



4 



20 



1,112 



101 



8.3 



5.0 



3 



25 



19 



6 



30 



1,087 



126 



10.4 



4.2 



4 



25 



17 



8 



40 



1,035 



178 



14.7 



4.4 



6 



25 



15 



10 



50 



995 



218 



18.0 



4.4 



6 



25 



13 



12 



60 



933 



280 



23.1 



4.6 



7 



25 



11 



14 



70 



937 



276 



22.8 



3.9 



8 



25 



9 



16 



80 



878 



335 



27.6 



4.2 



9 



26 



7 



18 



90 



850 



363 



29.9 



4.0 



10 



25 



5 



20 



100 



808 



405 



33.3 



8.8 



Protein in blank = 1,213 milligrams. 



Starch present. 



Acidity of papain solution as HC1 = 0.008 per cent. 



