Quality Control Calculators on DairyCalc – Dairy & Industrial Engineering Calculators

Brix Calculator — Sugar Concentration in Dairy Products

Wed, 01 Jan 2025 00:00:00 +0000

What is Brix?

Brix (°Bx) is a scale measuring the sugar (dissolved solids) content of a solution. In dairy processing, Brix is used to control:

Sweetened condensed milk — typically 54–60 °Brix after evaporation
Flavored milk drinks — sugar addition verification
Ice cream mix — total solids monitoring
Dairy-based beverages — Brix as a product quality parameter

Why Temperature Correction?

Refractometers are calibrated at 20°C. When samples are at different temperatures, a correction factor must be applied. For every 1°C above 20°C, add 0.03 °Brix; for every 1°C below 20°C, subtract 0.03 °Brix.

Milk Conductivity Calculator — Mastitis Detection

Wed, 01 Jan 2025 00:00:00 +0000

Electrical Conductivity of Milk

Electrical conductivity of milk measures how well it conducts electricity, primarily due to dissolved ions (chloride, sodium, potassium). It is a rapid, non-destructive test used for:

Mastitis detection — Mastitic milk has higher conductivity (>6 mS/cm vs normal 4–5 mS/cm)
Adulteration screening — Added water or solids change conductivity
Process monitoring — CIP verification and heat treatment effects

Temperature Effect on Conductivity

Conductivity increases by approximately 2% per °C rise in temperature. Results must be corrected to the standard reference temperature of 25°C:

pH Calculator — Temperature Correction for Dairy Products

Wed, 01 Jan 2025 00:00:00 +0000

What is pH and Why Does Temperature Matter?

pH measures the hydrogen ion concentration in a solution on a scale of 0–14. In dairy processing, pH is critical for:

Milk quality assessment — fresh milk has a pH of 6.6–6.8
Fermentation monitoring — yogurt fermentation reduces pH from ~6.7 to 4.0–4.6
CIP verification — confirming effective acid and alkali cleaning
Product standardization — maintaining consistent product character

Temperature significantly affects pH readings. A 10°C rise in temperature can change the pH reading by ±0.03 units. For accurate lab records, pH should always be reported at the standard temperature of 25°C.

Titratable Acidity Calculator — Lactic Acid % in Milk

Wed, 01 Jan 2025 00:00:00 +0000

What is Titratable Acidity?

Titratable acidity (TA) measures the total acid content of milk, expressed as % lactic acid. It reflects both the original acidity (due to phosphates, citrates, and CO₂ in fresh milk) and the developed acidity (lactic acid produced by bacterial fermentation).

This test is one of the most important routine quality tests at dairy receiving docks.

Formula

Titratable Acidity (%) = (Volume of NaOH × 0.009 × 100) / Volume of Milk Sample