/ 



1894.] certain Indian Food Stuffs. ■ ■ 7^ 



Mean of the above two determinations = 438 



But 1 c. c. N2S2OS was equal to (L— 0"1) gm. iodine. 



Corrected number =39*4 

 The saponification equivalent for this sample of ghee was 218 

 (V. 66). 



Iodine Degree for Mustard Oil. 



(1) 0*140 gm. oil was digested for about 24 hours with 20 c. c. iod 

 sol. and 10 c. c. chloroform. 



(2) 0'202 gm. oil was digested for the same length of time with 

 30c. c. iod. sol. and 10c. c. CHCI3 



20c. c. iod. sol. + 10c. c. CHCls = 27'5ec. NagSgOg (Blank exp.) 

 30 „ „ „ =4L-25c. c. „ 



(1) required 16*6c. c. NajSjOs for the excess of iodine. 



(2) j» 25*4 „ ,, ,, „ ,, ,, 



Amount of iodine consumed by (1 ) is equivalent to 10"9c. c. ISTaaS jOg 



„ „ „ (2) „ „ „ 15-85c. c. „ 



T^- 1 f n^ Q0J265X 10-9x100 



iodine degree tor ( 1 ) = 7-. = 9o'5 



'14 



,,, 001265 xlS-SSx 100 „„ , 

 " " " <2)= 0^202 -^^'^ 



But Ic. c. NagSaOg = Ic. c. Ixjrr^ (as found by actual ti- 



tration with pure iodine). 

 Iodine degree (corrected) =96*9 or 97*0 



Iodine Degree for Niger-seed Oil. 



(1) 0'137 gm.oil was digested with 30 c.c. iod. sol. and 10 c.c. chloroform. 

 (2)0-171 „ „ „ 40 „ 



(3) 0-098 „ „ „ 30 „ 



30c. c. I+lOc.c. OHCls = 45-2c. c. Na^SgOj (Blank exp.) 

 Whence also 



40 „ „ „ =60-26,, 



(1) Required 32'Oc. c. Na^SgOg for the excess of iodine. 



\") 55 4io'4i ,, ,, ,, ,, ,, 



(3) 55 35'6 „ „ ,, „ „ 



J A- A 4J /^^ 0-0 1265x1 3-2x100 , ., . 

 Iodine degree f or ( 1 ) = nT^T =121-8 



,„, 0-01265x16-86x100 ■ ^, „ 

 (2) = Tj^i = 124-7 



0-01265x9-6x100 

 (^)- 0^98 °^^^^ 



