Making Sense of Smells A Guide for Understanding Farmstead Odors

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Making Sense of SmellsA Guide for Understanding
Farmstead Odors
Douglas W. Hamilton Waste Management
Specialist Biosystems and Agricultural Engineering

• Part 3 Odor Measurement -- Notes

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Odors need not be so mysterious

1. They have structure
2. They are measurable

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Odor Measurement

• How does it smell?
• How Long?
• How Much?
• How Strong?

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Odor Measurement

• How does it smell?
• How Long?
• How Much?
• How Strong?

• Character

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Odor Measurement

• How does it smell?
• How Long?
• How Much?
• How Strong?

• Character
• Persistence

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Odor Measurement

• How does it smell?
• How Long?
• How Much?
• How Strong?

• Character
• Persistence
• Concentration

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Odor Measurement

• How does it smell?
• How Long?
• How Much?
• How Strong?

• Character
• Persistence
• Concentration
• Intensity

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Measuring Notes and Odors
Notes Odors
Character
Persistence
Concentration
Intensity
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Measuring Notes and Odors
Notes Odors
Character Verbal Description
Persistence
Concentration
Intensity
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Character
Organic Acids Acetic Acid Propionic Acid Butanoic Acid Iso-Valeric Acid Pentanoic Acid Alcohols, Aldehydes, Ketones Methanol Formaldehyde Acetone Methyl Ethyl Ketone Nitrogen Compounds Ammonia Methyl amine Dimethyl amine Diethyl amine Indole Skatole
Phenolic Compounds Phenol p-Cresol Sulfuric Compounds Hydrogen Sulfide Methyl mercaptan Dimethyl sulfide Diethyl sulfide
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Character
Organic Acids Acetic Acid Propionic Acid Butanoic Acid Iso-Valeric Acid Pentanoic Acid Alcohols, Aldehydes, Ketones Methanol Formaldehyde Acetone Methyl Ethyl Ketone Nitrogen Compounds Ammonia Methyl amine Dimethyl amine Diethyl amine Indole Skatole
Phenolic Compounds Phenol p-Cresol Sulfuric Compounds Hydrogen Sulfide Methyl mercaptan Dimethyl sulfide Diethyl sulfide
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Character
Organic Acids Acetic Acid Propionic Acid Butanoic Acid Iso-Valeric Acid Pentanoic Acid Alcohols, Aldehydes, Ketones Methanol Formaldehyde Acetone Methyl Ethyl Ketone Nitrogen Compounds Ammonia Methyl amine Dimethyl amine Diethyl amine Indole Skatole
Phenolic Compounds Phenol p-Cresol Sulfuric Compounds Hydrogen Sulfide Methyl mercaptan Dimethyl sulfide Diethyl sulfide
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Character
Organic Acids Acetic Acid Propionic Acid Butanoic Acid Iso-Valeric Acid Pentanoic Acid Alcohols, Aldehydes, Ketones Methanol Formaldehyde Acetone Methyl Ethyl Ketone Nitrogen Compounds Ammonia Methyl amine Dimethyl amine Diethyl amine Indole Skatole
Phenolic Compounds Phenol p-Cresol Sulfuric Compounds Hydrogen Sulfide Methyl mercaptan Dimethyl sulfide Diethyl sulfide
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Character
Organic Acids Acetic Acid Propionic Acid Butanoic Acid Iso-Valeric Acid Pentanoic Acid Alcohols, Aldehydes, Ketones Methanol Formaldehyde Acetone Methyl Ethyl Ketone Nitrogen Compounds Ammonia Methyl amine Dimethyl amine Diethyl amine Indole Skatole
Phenolic Compounds Phenol p-Cresol Sulfuric Compounds Hydrogen Sulfide Methyl mercaptan Dimethyl sulfide Diethyl sulfide
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Character
Organic Acids Acetic Acid Propionic Acid Butanoic Acid Iso-Valeric Acid Pentanoic Acid Alcohols, Aldehydes, Ketones Methanol Formaldehyde Acetone Methyl Ethyl Ketone Nitrogen Compounds Ammonia Methyl amine Dimethyl amine Diethyl amine Indole Skatole
Phenolic Compounds Phenol p-Cresol Sulfuric Compounds Hydrogen Sulfide Methyl mercaptan Dimethyl sulfide Diethyl sulfide
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Measuring Notes and Odors
Notes Odors
Character Verbal Description Offensiveness
Persistence Odor Chord
Concentration
Intensity
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Measuring Notes and Odors
Notes Odors
Character Verbal Description
Persistence Top Note Middle Note Base Note Odor Chord
Concentration
Intensity
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
NH3
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
NH3
H3C-NH-CH3
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Persistence
Top Notes Middle Notes Base Notes
Hydrogen Sulfide Ammonia Aldehydes Alcohols Ketones Amines Mercaptans Short Organic Sulfides Organic Acids Phenolic Compounds Indole Skatole Long Organic Sulfides
NH3
CH3
H3C-NH-CH3
N
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Measuring Notes and Odors
Notes Odors
Character Verbal Description
Persistence Top Note Middle Note Base Note Odor Chord
Concentration Detection Level Recognition Level
Intensity
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NH3 Recognition Level 37,000 ppb
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NH3 Detection Level 17 ppb
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NH3 Acute Hazard 50,000 to 100,000 ppb
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NH3 Chronic Exposure 25,000 ppb