Chemistry of Essential Oils

288 THE CHBMISTEY OF ESSENTIAL OILS

ESTEE DETERMINATIONS.

Sample G

of Oil. ' <

la

16

2a

26

3a

36

4«

46

5a

56

6a

66

Sample of

Oil.

1 2 3 4 5 6

Gms.of

C.C

.

of

• Oil Used. alcohol
  KOH used.

4-7976

5-2484

5%S329

5-4642

5-1840

5-3092

5-2851

4-9747

5-6123

5-6400

5-1156

5-5468

Saponifica-

tion Num-

ber.

157-13

113-93

134-29

118-44

129-53

125-41

56-7

56-7

56-7

56-7

56-7

56-7

56-47

56-62

56-81

56-81

56-81

56-81

Length of

Time

Heated.

half hour

one

half

one

half ,

one ,

half

one ,

half ,

one

half ,

one

™*

HoS0 4

Required

for 100 c.c.

of

Solution.

7-94

7-6

8-45

8-46

, f 7-63

7-64

7'61

7-85

7-5

7-56

8-08

7-6

Saponi-

fi cation

Number.

100-4

99-7

75-8

73-78

100-19

97-56

97-58

97-65

96-29

94-32

89-61

94-9

ACETYLATION VALUES.

Correspond-

ing Amount

of Alcohol.

Per Cent.

48-97

34-25

41-07

35-74

39-45

38-06

Alcohol Com-

bined as

Ac-tt^o

Per Cent.

27-42

20-30

26-84

26-85

25-93

26-10

Amount

of

Thujyl

Alcohol.

Amount

of Ester

Expressed

as Thujyl

Acetate.

27-61

27-42

20-84

20-3

27-55

26-84

26-84

26-85

26-48

25-93

24-64

26-10

35-U

34-89

26-53

25-83

35-07

34-16

34-16

34-18

33-70

33-00

31-36

33-21

Amount of

Free Alcohol

in Oil = Thujyl

Alcohol.

Per Cent

21-55

13-95

14-23

8-89

13-52

11-96

Amount of

Acetate

present =

Thujyl Acetate.

Per Ce.

34-89

28-83

34-16

34-17

33-00

33-12

Roure-Bertrand-Fils
l
have examined two samples distilled by them-
selves from the wild plants and found them to contain the following :—

1. 
   
   
   
   2. Esters 90 per cent. 5-5 per cent.
      Combined alcohols.. .70 „ 4'3 ,,
      Free alcohols... .71-9 „ 76-3 „
      Thujone 8-4 „ 3-0 „
      Thujyl alcohol appears to be formed at the expense of the thujone
      present as the growth of the plant proceeds. Two oils examined by
      Charabot,
      2
      which had been distilled at an earlier and a later date from
      the same plantation, gave the following results :—
   
   
   
   


2. 
   
   
   
   2. 0-9253
      13-1 per cent.
      .7-6 „
      9'2
      19-5
      Thujone ..... 43'1 „ 35'0 „
      It contains a considerable proportion of the ketone thujone, varying
   
   
   
   

Specific gravity

Esters ....

Free thujyl alcohol.

Combined thujyl alcohol.

Total „ „

Thujone 43'1

0'9307

9-7 per cent

• 7-6 „
  . 9-0
  . 16-6


• 43'1

1

Bulletin, April (1906), 36. *Comptes rendiis, 130 (1900), 923.