Table 3 Representative concentratios (ppm) by P-XRF of pigments on the studied painting

Blue-1

Mean

188,019

69,928

18,726

1,134

214,938

ND

8,426

55,078

ND

4,285

ND

9,037

ND

5,707

SD

39,246

23,248

18,419

158

98,813

ND

11,915

17,751

ND

2,270

ND

3,781

ND

ND

Max.

215,770

86,366

31,750

1,246

284,809

ND

16,851

67,630

ND

5,890

ND

11,710

ND

7,713

Min.

160,268

53,489

5,702

1,022

145,067

ND

ND

42,526

ND

2,680

ND

6,363

ND

3,701

Blue-2

Mean

119,355

50,436

9,147

1,121

341,514

ND

1,359

57,663

ND

4,228

ND

33,763

ND

9,470

SD

2,029

4,718

4,888

149

30,790

ND

2,717

14,518

ND

309

ND

24,317

ND

8,068

Max.

121,166

56,648

14,074

1,265

368,397

ND

5,434

78,262

ND

4,616

ND

59,991

ND

17,536

Min.

117,417

45,759

4,783

930

307,801

ND

ND

45,364

ND

3,880

ND

12,844

ND

2,515

Green

Mean

115,166

42,613

25,780

766

35,175

30,524

23,684

28,938

24,820

110,568

ND

149,915

46

18,180

SD

73,632

21,629

23,358

623

50,422

32,902

20,590

12,510

14,286

76,859

ND

94,787

153

23,602

Max.

261,796

72,956

80,064

1,947

148,206

80,061

67,626

49,617

47,419

296,732

ND

311,848

507

74,405

Min.

54,172

ND

7,202

ND

3,609

ND

6,208

11,315

ND

13,716

ND

13,321

ND

ND

Yellow-1

Mean

66,816

ND

7,555

ND

11,017

ND

1,782

90,707

ND

ND

55,919

8,756

548

288,094

SD

8,041

2,975

1,902

11,116

7,225

ND

3,564

34,826

4,720

ND

12,828

5,766

866

31,603

Max.

77,951

19,286

9,885

81,718

17,343

ND

7,128

132,885

30,303

ND

74,749

14,337

1,820

323,689

Min.

58,842

12,453

5,526

58,638

4,424

ND

ND

59,470

19,529

ND

46,032

3,510

ND

246,801

Yellow-2

Mean

60,278

14,611

12,199

72,400

3,727

ND

5,764

140,291

29,398

2,005

67,742

6,389

ND

252,850

SD

7,837

3,079

4,394

18,502

1,900

ND

4,992

9,996

6,403

3,472

13,465

398

ND

56,329

Max.

68,560

17,255

15,254

83,346

5,877

ND

8,684

151,754

36,457

6,014

82,836

6,707

ND

289,484

Min.

52,979

11,230

7,164

51,038

2,277

ND

ND

133,392

23,966

ND

56,966

5,943

ND

187,988

Red

Mean

109,215

51,483

56,471

17,933

30,023

ND

11,647

126,608

27,071

241

20,687

4,008

5,520

187,009

SD

67,900

51,070

47,584

20,026

28,673

ND

3,936

47,290

25,416

462

24,411

2,008

7,667

191,981

Max.

208,888

141,941

144,556

56,922

65,373

ND

16,945

176,624

59,990

1,184

66,173

7,032

16,299

373,432

Min.

30,988

8,371

13,311

943

2,229

ND

6,850

42,744

ND

ND

ND

1,765

ND

ND

Black

Mean

196,408

81,706

28,058

1,976

85,953

ND

33,818

71,263

19,528

1,054

ND

3,348

ND

59,164

SD

76,697

39,621

14,544

507

75,135

ND

17,405

41,787

30,856

1,342

ND

2,565

ND

133,429

Max.

252,724

122,297

46,489

2,514

194,497

ND

55,483

125,777

68,180

3,000

ND

7,576

ND

331,475

Min.

63,842

16,992

11,076

1,098

16,859

ND

12,746

35,642

ND

ND

ND

678

ND

ND

White

Mean

151,220

42,596

13,109

4,440

225,922

39,842

7,623

47,701

3,594

803

7,159

2,140

ND

48,402

SD

69,768

29,725

8,795

3,905

70,754

69,479

8,007

23,056

11,918

1,003

12,349

2,351

ND

96,896

Max.

244,566

89,153

27,255

11,088

341,179

175,919

24,628

98,436

39,529

2,952

28,798

7,406

ND

316,554

Min.

58,740

ND

4,361

1,039

95,963

ND

ND

ND

ND

ND

ND

559

ND

571

Violet

Mean

234,391

51,155

26,454

917

34,920

73,223

21,793

72,511

ND

442

ND

27,799

ND

7,934

SD

13,900

3374

4,524

130

3,895

2,331

3,268

8,832

ND

624

ND

7,828

ND

277

Max.

244,220

53,541

29,653

1,009

37,674

74,871

24,104

78,756

ND

883

ND

33,334

ND

8,130

Min.

224,562

48,769

23,255

825

32,165

71,575

19,482

66,265

ND

ND

ND

22,263

ND

7,738

Pink

Mean

177,186

20,127

11,374

8,137

109,155

96,045

8,041

33,532

4,188

150

10,220

5,786

ND

99,309

SD

89,135

13,519

4,724

4,925

130,723

67,834

5,850

29,904

8,377

300

8,607

6,068

ND

123,079

Max.

230,166

28,167

16,438

13,734

304,902

158,080

13,997

71,002

16,753

599

20,948

13,953

ND

277,324

Min.

43,800

ND

7,037

1,758

34,669

ND

ND

ND

ND

ND

ND

1,115

ND

2,228