🔬 IR Calculator - Gas Chromatography
Calculate Kovats Retention Index (IR) values using n-alkane standards
Instructions: Enter the retention times for your n-alkane standards (you can start from any carbon number like C6, C7, etc., and skip any alkanes you don't have). Then, enter the retention times of your unknown compounds. The IR values will be calculated automatically using the Kovats Retention Index formula.
1. Enter Retention Times for n-Alkanes (ex: C5-C30)
Enter the retention time (in minutes) for each n-alkane standard you have. You don't need to fill all of them - just enter the ones you have (e.g., you can start from C6 or C7):
📋 Paste from Excel: Copy your alkane data from Excel and paste below:
Data will be automatically loaded when you paste.
Supported formats:
Format 1: C5 1.63
Format 2: 5 1.63
Format 3: Cnumber Retention time
5 1.63
6 2.02
Format 1: C5 1.63
Format 2: 5 1.63
Format 3: Cnumber Retention time
5 1.63
6 2.02
2. Enter Unknown Compounds
Enter compound names and their retention times manually, or paste data from Excel:
📋 Paste from Excel: Copy your data from Excel (RT and Name columns) and paste below:
Data will be automatically loaded when you paste.
Expected format:
RT Name
1.93 2-methyl-pentane
2.01 3-methyl-pentane
3.15 Pentanal
RT Name
1.93 2-methyl-pentane
2.01 3-methyl-pentane
3.15 Pentanal