UV-Vis Peak Analyzer
Plot your absorbance spectrum, automatically detect the wavelength of maximum absorbance (λmax), and analyze your UV-Vis spectrophotometry data like a pro.
Spectrum Analysis
λmax (Peak Wavelength)
0 nm
Amax (Peak Absorbance)
0 AU
UV-Vis Peak Analyzer Tool – Instantly Detect λmax and Amax
Welcome to the UV-Vis Peak Analyzer – your go-to tool for analyzing UV-Visible spectroscopy data. This interactive web tool helps B. Pharm and pharmaceutical science students find the wavelength of maximum absorbance and its corresponding absorbance , quickly and accurately.
Whether you’re identifying a compound or estimating drug concentration, this tool makes spectral analysis fast, visual, and lab-ready.
Why This Tool Matters
UV-Vis spectroscopy is one of the most widely used techniques in pharmaceutical analysis. From quantifying active ingredients to monitoring purity, UV-Vis data is essential. But raw data can be hard to read—this tool makes it easy.
It calculates:
The exact peak wavelength
The corresponding absorbance at the peak
And presents an interactive graph to visualize your spectrum
Perfect for lab reports, assignments, or online learning.
🔑 Key Features
✅ Dual Data Input
CSV Upload: Best for large data sets
Manual Entry: For quick entries or small data samples
✅ Auto Peak Detection
Instantly calculates λ<sub>max</sub> and A<sub>max</sub>
No need to manually inspect data
✅ Interactive Spectrum Plot
Built with Chart.js
Visualizes Wavelength vs. Absorbance curve
Peak is highlighted with a labeled vertical line
✅ Hover Tooltips
Move your cursor over the plot to read:
Exact wavelength (nm)
Absorbance value (AU)
✅ Result Summary
Final λ and A displayed clearly under the graph
Perfect for copying into lab reports
✅ PNG Export
Save a high-resolution graph image with results
Ideal for digital lab notebooks and study presentations
📋 How to Use the UV-Vis Peak Analyzer
Step 1: Upload or Enter Your Data
You have two options:
A) Upload a CSV File (Recommended)
Open Excel or Google Sheets
Format your data with two columns:
Column 1: Wavelength (nm)
Column 2: Absorbance (AU)
Do not include headers
Save the file as
.csvClick “Download Sample CSV” to see correct format
Use the “Choose File” button to upload
Your data will be instantly displayed in the input table
B) Enter Data Manually
Enter each Wavelength (in nm)
Enter the corresponding Absorbance (in AU)
Click “+ Add Data Point” to add more rows
Use × button to remove rows
Step 2: Analyze the Spectrum
Once all data is entered:
Click “Analyze Spectrum”
The tool will:
Calculate the peak values
Plot the graph
Highlight λ on the curve
Step 3: Review the Output
View the Interactive Graph
Zoom in, hover over points, see real-time values
λ is marked by a labeled vertical line
Check the Results Summary
λ: Wavelength at peak
A: Peak absorbance
Step 4: Export and Reset
Click “Export as PNG” to download a complete image
Great for attaching to lab assignments or presentations
Click “Reset” to clear all data and start again
Built for Learning & Practical Use
This analyzer is more than just a calculator—it’s a full educational tool for pharmacy students:
Makes spectroscopy interactive
Simplifies visual analysis
Saves time in lab calculations
Enhances understanding of UV absorbance behavior
Whether you’re working from home or at the lab bench, it’s built to support your learning.
