Coffee flavor is the result of chemical compounds formed during three stages:

1️⃣ Coffee cultivation
2️⃣ Coffee processing
3️⃣ Coffee roasting

These stages determine the sensory architecture measured by ABCVA™:

• Aroma
• Balance
• Complexity
• Vibrancy
• Aftertaste

1. Aroma Chemistry

Coffee aroma is created by volatile organic compounds (VOCs) released when coffee is ground and brewed.

Scientists have identified over 800 aroma compounds in coffee.

These compounds form during roasting through reactions like:

• Maillard reaction
• caramelization
• Strecker degradation

Major Aroma Compound Groups

Floral Aromas

Chemical sources:

• Linalool
• Geraniol

Typical aromas:

• jasmine
• rose
• orange blossom

Common in:

• Ethiopian coffees
• high-altitude washed coffees

Fruity Aromas

Chemical sources:

• Esters
• Ethyl acetate
• Isoamyl acetate

Typical aromas:

• berry
• apple
• tropical fruit

Often found in:

• natural processed coffees

Citrus Aromas

Chemical sources:

• Citral
• Limonene

Typical aromas:

• lemon
• lime
• orange

Common in:

• Kenyan coffees

Nutty Aromas

Chemical sources:

• Pyrazines

Typical aromas:

• almond
• peanut
• hazelnut

Often present in:

• Brazilian coffees

Chocolate Aromas

Chemical sources:

• Furans
• 2-furfurylthiol

Typical aromas:

• cocoa
• dark chocolate

Often produced during medium roasting.

2. Acidity Chemistry (Vibrancy)

Acidity in coffee comes from organic acids in the coffee bean.

These acids determine the Vibrancy attribute in ABCVA™.

Major Coffee Acids

Citric Acid

Flavor profile:

• lemon
• citrus brightness

Common in:

• Kenyan coffees
• washed coffees

Malic Acid

Flavor profile:

• green apple
• crisp fruit acidity

Common in:

• Central American coffees

Tartaric Acid

Flavor profile:

• grape-like acidity

Common in:

• high altitude coffees

Phosphoric Acid

Flavor profile:

• sparkling
• cola-like brightness

Common in:

• Kenyan coffees

3. Sweetness Chemistry

Sweetness in coffee comes from carbohydrates and sugar breakdown during roasting.

Green coffee contains:

• sucrose
• glucose
• fructose

During roasting, sugars caramelize producing flavors such as:

• caramel
• toffee
• honey

This contributes to Balance in the ABCVA™ system.

4. Bitterness Chemistry

Bitterness is caused by compounds like:

• chlorogenic acid
• quinic acid
• caffeine

While bitterness is natural, excessive bitterness can reduce Balance.

Bitterness increases with:

• darker roasting
• over extraction

5. Body and Texture Chemistry

Body refers to viscosity and mouthfeel.

It is influenced by:

• lipids (coffee oils)
• proteins
• dissolved solids

Examples:

Body contributes to Balance and Aftertaste.

6. Complexity Chemistry

Complexity occurs when multiple flavor compounds interact.

Factors influencing complexity include:

• coffee variety
• altitude
• fermentation
• processing method

Natural processed coffees often show higher ester production, creating fruit complexity.

7. Aftertaste Chemistry

Aftertaste is caused by long-lasting compounds that coat the palate.

These include:

• oils
• sugars
• phenolic compounds

A good coffee leaves a sweet lingering finish.

8. Defect Chemistry

Flavor defects are caused by undesirable chemical compounds.

Fermented Defect

Cause:

• uncontrolled microbial fermentation

Chemistry:

• excess acetic acid

Flavor:

• overripe fruit
• vinegar

Moldy Defect

Cause:

• fungal contamination

Chemical source:

• geosmin

Flavor:

• damp basement

Phenolic Defect

Cause:

• bacterial contamination

Chemical source:

• phenols

Flavor:

• medicinal plastic

9. Influence of Processing on Flavor Chemistry

Processing dramatically affects flavor.

Washed Processing

Produces:

• clean acidity
• floral aromatics

Natural Processing

Produces:

• fruity esters
• heavier body

Honey Processing

Produces:

• balanced sweetness
• caramel flavors

10. Influence of Altitude

Higher altitude slows cherry maturation.

Result:

• higher sugar concentration
• greater acidity
• more complex aromatics

This explains why many high altitude Kenyan coffees show vibrant acidity.

ABCVA™ Flavor Architecture

Together these define the structural integrity of the cup.

Scientific Vision of ABCVA™

ABCVA™ treats coffee tasting as applied sensory chemistry, not just subjective opinion.

By connecting:

• sensory perception
• chemical composition
• agricultural practices

the system can provide a scientifically grounded evaluation method ;