1894'] certain Indian Food Stuffs. 79 



Iodine Degree for Sesame' Oil.* 

 (November 29, 1893.) 



(1) 0*2806 gm. oil was digested with 20c. c. iod. sol. and 10c. c. 

 CHOI J. 



5*9 c. c. NagSgOj were required for the excess of iodine. 

 20 c. C.I =29-8c. c.NagS.Oa (Blank exp.) 



T J- J 23-9 X 0-01265x100 ,^^ ^ 

 lodme degree = 0^2806 "^ 



But Ic. c, NaaSgOs had the actual strength Ic. c. X (1 — 0-02) — I 



Corrected number = 107-7 (1 -0'02) = 105-5 

 (December 5, 1893.) 



(2) 0-1721 gm. oil was digested with 20c. c, I sol. and 10c. c. CHCl 3 



(3) 0-2065 „ 



(4) 0-227 „ 



N 

 20c. c. I sol.+ lOc. c. CHCI3 == 25-5c. c. — Na^SgOa (Blank titration) 



N"o. (2) required 10-9 c. c. NajSaOs for the excess of iodine. 

 No. (3) „ 8*2 „ 



No. (4) „ 6-4 „ „ „ „ „ 



From which we get the iodine degree for 



(2) = 10-73) 



(3) = 106-0 \ mean = 106-6 



(4) = 106-4 ) 



But Ic. c. Na^SjO,, = Ic.c. I (1-002) 



Corrected number = 106-6 ( I -002) = 104-5. 



Iodine Degree for Lard. 



(1) 0-2215 gm. lard was digested with 20o. c. I and 10c. c. CHCI3 



(2) 0-1995 „ 



15*1 c. c. NaaSaOg were required by (1) for the excess of iodine 



16'I r2) 



20c. c.I + 10c.c.CHCl3= 24-1 c.c. Na3S303 (Blank exp.) 



T 1- ^ . /lA 9x0-01265x108 

 lodme degree tor (1) = nToo'n = oi'4 



8 X 0-01265 xlO» 



(^> = 0T995 = '^^^ 



Mean of the two determinations = 51-0 



N 

 But Ic.c. Na^S^Og = Ic. c. — I x (1 -0-02) 



Whence corrected number = 50-0 



* The oil was extracted from the seeds by means of carbon bisnlphide, and it 

 was the same as used for determining the saponification equivalent. 



