Table 1 Samples used for validation.

From: Near-infrared hyperspectral imaging to map collagen content in prehistoric bones for radiocarbon dating

BRAVHO lab code

Country-Territory

Sample analysed

Sample taken (mg)

Collagen extracted (mg) >30 kDa

% Collagen >30 kDa

Collagen extracted (mg) <30 KDa

% Collagen <30 KDa

Total collagen % extracted

% Estimation by NIR-HSI fragment

BRA-3586

Central Europe

Powder

479

52.8

11%

5.3

1%

12%

12 ± 2%

BRA-3813

Iberian Peninsula

Powder

799

2.3

0.29%

6.6

0.83%

1%

2 ± 2%

BRA-3607

Iberian Peninsula

Powder

571

78.3

14%

2.5

0%

14%

12 ± 2%

BRA-3367

Central Europe

Piece

496

34.8

7%

10.8

2%

9%

10 ± 2%

BRA-6334

Italian Peninsula

Piece

975

0%

0%

0

0%

0%

2 ± 2%

BRA-6335

Italian Peninsula

Piece

1143

0%

0%

0

0%

0%

2 ± 2%

  1. The six samples used to validate the model with previously extracted collagen in the powder samples and subsequently extracted collagen from the pieces.
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