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Table 1 Summary of the main thermal analytical data obtained by TG-DTG

From: Archaeometric classification of ancient human fossil bones, with particular attention to their carbonate content, using chemometrics, thermogravimetry and ICP emission

Sample number

Step (a)

Step (b)

Step (c)

% TG residue at 1000°C

  

Between about 190°C and 550°C

Between about 600°C and 850°C

 
  

(Collagen decomposition process)

Substep c(1)

Substep c(2)

 
    

Between about 600°C and 750°C

Between about 750°C and 850°C

 
   

(secondary carbonate decomposition)

(original carbonate decomposition)

 
 

% H2O loss

Main DTG peak T°C

Total % mass loss

% mass loss

% mass loss

 

1

7.6

333

29.3

1.5

0.4

61.1

2

8.3

332

28.0

1.7

0.3

61.3

3

6.7

335

28.5

1.4

0.3

62.7

4

7.1

329

30.6

1.6

0.4

59.1

5

8.6

334

29.1

1.5

 

60.0

6

8.2

330

27.0

1.1

 

62.5

7

6.1

330

31.4

1.4

 

61.1

8

8.2

331

26.9

1.5

0.4

62.4

9

8.3

334

28.2

1.4

 

61.6

10

8.1

335

28.6

1.6

0.4

60.6

11

7.3

335

26.3

2.0

 

63.8

12

7.1

335

24.1

2.6

1.0

64.7

13

6.9

333

27.7

2.1

 

62.5

14

4.8

340

5.4

 

1.5

87.4

15

6.6

330

4.3

3.1

0.8

83.8

16

7.6

330

8.0

3.5

1.2

79.2

17

5.6

325

7.8

3.5

1.0

81.4

18

6.8

340

5.1

3.0

0.8

83.7

19

6.0

345

3.1

3.3

0.8

86.0

20

5.9

350

4.0

2.8

 

86.1

21

5.9

330

6.1

2.7

0.4

83.4

22

6.6

325

5.9

3.6

1.5

82.0

23

7.2

350

6.1

2.7

0.9

82.4

  1. RSD% ≤ 1.2 for all T values.
  2. RSD% ≤ 1.5 for all % mass loss values and residue at 1000°C.