1. What is an SO2 Addition Calculator?

Definition: This calculator determines the amount of sulfur dioxide (SO₂) needed to reach a target concentration in a given volume of liquid.

Purpose: It helps winemakers, brewers, and food processors accurately dose SO₂ for preservation and sanitation purposes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( A \) — SO₂ to add (mg)
• \( SO₂_t \) — Target molecular SO₂ (mg/L)
• \( SO₂_c \) — Current molecular SO₂ (mg/L)
• \( V \) — Volume of liquid (L)

Explanation: The difference between target and current concentrations is multiplied by the volume to determine the total amount needed.

3. Importance of SO2 Calculation

Details: Proper SO₂ levels prevent oxidation and microbial spoilage while ensuring product safety and quality.

4. Using the Calculator

Tips: Enter the target SO₂ concentration, current SO₂ concentration, and volume of liquid. All values must be ≥ 0 (volume must be > 0).

5. Frequently Asked Questions (FAQ)

Q1: What are typical SO₂ targets?
A: For wine: 0.5-1.5 mg/L free SO₂ (varies by pH and wine type). For food processing, consult safety regulations.

Q2: How do I measure current SO₂?
A: Use an SO₂ testing kit or send samples to a lab for analysis.

Q3: What if my current SO₂ is higher than target?
A: The calculator will show a negative value, indicating no addition is needed (or you need to reduce SO₂).

Q4: Does this account for bound SO₂?
A: No, this calculates molecular SO₂. For total SO₂ calculations, additional factors must be considered.

Q5: How do I convert mg to ppm or other units?
A: 1 mg/L = 1 ppm. For other conversions, use our unit conversion tools.