Serial Dilution Calculator
Design and visualize serial dilution series for dose-response studies, calibration curves, and microbial susceptibility testing. Automatically calculates transfer and diluent volumes for each step.
Parameters
Dilution Series
| Step | Concentration | Transfer (µL) | Diluent (µL) |
|---|---|---|---|
| 1 | 0.0010 M | 50.0 | 50.0 |
| 2 | 0.500 mM | 50.0 | 50.0 |
| 3 | 0.250 mM | 50.0 | 50.0 |
| 4 | 0.125 mM | 50.0 | 50.0 |
| 5 | 0.063 mM | 50.0 | 50.0 |
| 6 | 0.031 mM | 50.0 | 50.0 |
About Serial Dilutions
Serial dilutions are a fundamental technique in biology, chemistry, and microbiology. By systematically reducing the concentration of a solute through repeated transfer and dilution steps, researchers can establish dose-response relationships, characterize enzyme kinetics, and determine microbial susceptibility to antimicrobials.
Common Applications
- Dose-response studies: Testing how cell or organism response varies with drug or stimulus concentration
- Calibration curves: Building standard curves for quantifying unknown samples via UV-Vis, HPLC, or mass spectrometry
- MIC testing: Determining minimum inhibitory concentrations of antibiotics against bacterial strains
- Antibody titration: Finding optimal antibody concentrations for immunoassays and flow cytometry
Serial Dilutions in Microfluidics
Microfluidic platforms excel at automating serial dilutions through integrated on-chip gradient generators and mixing networks. These allow rapid creation of concentration gradients with minimal dead volume and reduced reagent consumption—critical for expensive biologics and high-throughput screening. Common approaches include diffusion-based gradients, multi-layer mixer cascades, and droplet-based dilution.
Common Pitfalls
- Carryover contamination: Failing to properly clean pipette tips between steps, especially with viscous or sticky samples
- Inadequate mixing: Incomplete homogenization at each step leads to concentration heterogeneity and erratic results
- Dead volumes: Not accounting for residual liquid in tips and tubes can skew actual concentrations
- Evaporation: Extended pipetting at room temperature can lose volatile solvents and alter concentrations
- Wrong diluent: Using distilled water instead of buffer or media can affect pH, osmolarity, and assay readouts
Need a custom microfluidic chip?
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