Volatile Oil

Question 1

Voilatile Oils are also known as ?

Answer 1

Ethereal Oils / Essential Oils / Essences

Question 2

This is determined by the westphal balance or pcynometer. Specific gravity values ranges from 0.84 to 1.2. Oils lighter than water are: orange, caraway, coriander, lemon, turpentine and rosemary oils. Oils heavier than water include: anise, cinnamon, clove, sassafras oils

Answer 2

Specific gravity

Question 3

This is measured by polarimeter. Presence of adulterants such as alcohol or turpentine oil is determined by its influence in the rotatory power values.

Answer 3

Rotatory power

Question 4

This is most commonly used instrument is the Abbe Refractometer. Refractive index values ranges from 1.46 to 1.61 at 20°C. in some cases, the determination may serve in the detection of extraneous matter

Answer 4

Refractive index

Question 5

USP provides the official method for determining the distilling range.

Answer 5

Distilling range

Question 6

The fractionation of the oil determines possible presence of alcohol which distills or boils below 100°C. A certain fraction of distilled oil may be used to determine presence of adulterants by determining the rotary power

Answer 6

Fractional distillation

Question 7

Generally, volatile oils are soluble in organic solvents. Purity may be well established based on the fact that all volatile oils exhibit almost constant solubility with 90, 80 or 70% alcohol. Presence of adulterants such as turpentine oil, petroleum oils and fatty oils are slightly soluble thus producing turbidity.

Answer 7

Solubility

Question 8

Menthol

Answer 8

Peppermint Oil

Question 9

Borneol

Answer 9

Rosemary oil