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.

1. Input Your Data

Format: Wavelength,Absorbance per line. No headers. (Download Sample CSV)


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)

  1. Open Excel or Google Sheets

  2. Format your data with two columns:

    • Column 1: Wavelength (nm)

    • Column 2: Absorbance (AU)

  3. Do not include headers

  4. Save the file as .csv

  5. Click “Download Sample CSV” to see correct format

  6. Use the “Choose File” button to upload

  7. Your data will be instantly displayed in the input table

B) Enter Data Manually

  1. Enter each Wavelength (in nm)

  2. Enter the corresponding Absorbance (in AU)

  3. Click “+ Add Data Point” to add more rows

  4. 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.