buffer-recipe-scaler

name	buffer_recipe_scaler
description	Scale a buffer recipe to a target volume and compute component masses/volumes.
category	bio/molecular_lab
version	1
requires_tools	["python_repl"]
requires_network	false
user_invocable	true
species	any
modality	wet_lab
stage	utilities
stability	experimental
safety_level	low

Buffer Recipe Scaler

When to use

User gives a buffer recipe (components + concentrations or amounts per L) and wants it scaled to a different volume.

Inputs

• recipe: List of components with concentration (e.g. 50 mM Tris) or mass per liter.
• target_volume: Desired final volume (e.g. 100 mL).
• MWs (if needed): Molecular weights for components that need mass from molarity.

Steps

1. Parse: Extract each component and its concentration or mass/L.

2. Scale: For each component: scaled_mass = (mass_per_L or M×MW) × (target_volume_L). Use python_repl.

3. Order: List components in a standard order (often Tris first, then others, then bring to volume).

4. Present: Table: Component | Amount (g or mL) | Notes; then "Bring to {target_volume} with water."

Output format

• Scaled recipe table
• Final instruction (bring to volume, pH if relevant)