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Table 2 Composition and the unique IR peaks observed in the 98 matched specimens

From: Development and validation of standard and real patient gallstone library using Fourier transform infra-red spectroscopy

Stone type

Number of stones n (%)

IR peaks observed

Cholesterol only

4 (4.08%)

1022, 1051, 1366, 1463, 2865, 2899, 2934

Cholesterol + Bile Salt + Bilirubinate

90 (91.83%)

1022, 1051, 1366, 1463, 2865, 2899, 2934, 984, 1049, 699, 984, 1249, 1366, 1572

Bile Salt + Calcium carbonate + Bilirubinate

4 (4.08%)

984, 1049, 1628, 3445, 699, 984, 1249, 1366, 1572