Odor - The Electronic Nose Artificial Olfaction Technology - page 99

Table 4.6 (continued)

Compound Odor index

Methylacetate 1,100

Methylamine 940,000

Methylamylalcohol 12,650

Methylchloride 200,000

Phenol 16

Propane 425

Propionic acid 112,300

Skatole 30,000

Toluene 720

Valeric acid 256,300

• Cost and Benefit of Analysis—What is the total cost of running the instrument
including maintenance, methods development, sample handling, operator

training, and disposables?

Applications of odor measurement in industries

• Foods: Assessment of freshness, quality control of foods, and beverages
• Chemicals: Quality monitoring of synthetic chemicals
• Odor abatement facilities: Efficiency check of deodorizing facilities
• Deodorants: Deodorizing efficiencies
• Air cleaners: Efficiencies of deodorization
• Air conditioners: Measurements of malodors from air conditioners
• Refrigerators: Deodorizing system of offensive odors in a refrigerator
• Vacuum cleaners: Treatments for bad smell of exhaust air
• Automobiles: Odors in a new or old cabin, malodors from stuff.

Odor evaluation methods could be categorized from various standpoints.
Figure 4.9 shows same and also Table 4.7 categorized odor measurement tech-
nology with remarkable advantages and disadvantages.
The sense of odor involves three principal factors: concentration of odorous
substances, sensory odor intensity, and odor quality including hedonic tone.