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Table 1 Precision Study of 31 peaks of the four pure standards in gallstone analysis

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

Pure standards

Mean IR bands observed (cm−1)

SD

CV (%)

Cholesterol

2930.4

0.27

0.0

 

2899.9

0.19

0.0

 

2865.7

0.15

0.0

 

1464.2

0.18

0.0

 

1375.8

0.17

0.0

 

1364.4

0.20

0.0

 

1054.8

0.21

0.0

 

1022.4

0.14

0.0

Calcium

3487.2

3.15

0.1

 

3449.3

3.8

0.1

 

1628.0

0.96

0.1

 

1613.2

0.67

0.0

Bilirubin

1687.2

0.30

0.0

 

1643.7

0.40

0.0

 

1607.0

0.21

0.0

 

1567.3

0.17

0.0

 

1404.4

0.21

0.0

 

1363.6

0.05

0.0

 

1246.6

0.26

0.0

 

1216.6

0.13

0.0

 

984.8

0.19

0.0

 

932.5

0.16

0.0

 

695.7

0.09

0.0

Bile Salt

1601.7

0.84

0.1

 

1403.0

1.14

0.1

 

1375.3

0.40

0.0

 

1196.0

0.29

0.0

 

1076.8

0.12

0.0

 

1044.1

0.37

0.0

 

980.6

0.19

0.0

 

913.7

0.15

0.0