Home Profile Market Place Sweeteners Lab Methods Glossary Search
Master Index Environment Application Starch Statistics Tables Write us

International Starch Institute
Science Park Aarhus, Denmark
ISI 06 Table 1c - Determination of Dry Matter in Acid Converted 55 DE Syrup by Refractive Index

1. Scope The table is applicable to 55 DE acid converted syrup with 0.4% ash on dry matter. LT 24 Nov. 1997
2. Principle The refractive index of sample is transformed to dry matter by a table.
3. Apparatus 3.1 Refractometer with thermostat
4. Procedure Adjust temperature of refractometer (3.1) to 20, 30, 45 or 60 oC. +/- 0.2 oC
Adjust sample temperature to that chosen for the refractometer.
Place a few drops of sample on fixed prism and close instrument Work fast
Read the refractive index (nD) to nearest 0.0002 unit. Clean prisms immediately after.
5. Calculation Find dry matter (DM) in percent of sample (average results of two samples with no decimal) by using table: Correct eventually for differing DE

DM%

20 oC

30 oC

45 oC

60 oC

0

1,33299

1,33194

1,32985

1,32725

2

1,33590

1,33483

1,33271

1,33008

4

1,33890

1,33780

1,33564

1,33299

6

1,34195

1,34081

1,33863

1,33595

8

1,34504

1,34388

1,34166

1,33896

10

1,34818

1,34699

1,34474

1,34202

12

1,35137

1,35016

1,34787

1,34513

14

1,35461

1,35337

1,35106

1,34828

16

1,35790

1,35663

1,35429

1,35149

18

1,36124

1,35995

1,35757

1,35476

20

1,36463

1,36331

1,36091

1,35807

22

1,36807

1,36673

1,36430

1,36144

24

1,37157

1,37020

1,36774

1,36486

26

1,37512

1,37373

1,37123

1,36834

28

1,37872

1,37731

1,37479

1,37187

30

1,38238

1,38094

1,37839

1,37546

32

1,38610

1,38463

1,38206

1,37910

34

1,38987

1,38838

1,38578

1,38281

36

1,39370

1,39218

1,38956

1,38657

38

1,39758

1,39605

1,39339

1,39039

40

1,40153

1,39997

1,39729

1,39427

42

1,40554

1,40395

1,40125

1,39822

44

1,40960

1,40800

1,40527

1,40222

46

1,41373

1,41210

1,40935

1,40629

48

1,41792

1,41627

1,41350

1,41042

50

1,42218

1,42051

1,41771

1,41462

52

1,42650

1,42480

1,42198

1,41888

54

1,43088

1,42917

1,42632

1,42321

56

1,43533

1,43360

1,43073

1,42761

58

1,43985

1,43809

1,43521

1,43208

60

1,44444

1,44266

1,43976

1,43661

62

1,44910

1,44730

1,44437

1,44122

64

1,45382

1,45201

1,44906

1,44590

66

1,45862

1,45679

1,45382

1,45066

68

1,46350

1,46164

1,45866

1,45549

70

1,46844

1,46657

1,46357

1,46039

72

1,47347

1,47157

1,46856

1,46537

74

1,47857

1,47665

1,47362

1,47044

76

1,48374

1,48181

1,47877

1,47558

78

1,48900

1,48705

1,48399

1,48080

80

1,49434

1,49237

1,48930

1,48610

82

1,49976

1,49777

1,49469

1,49149

84

1,50526

1,50326

1,50016

1,49697
6. Notes
7. Reference International Standard: ISO 1743

| Top of Page | Method ISI 06 | LabIndex |

Copyright© 1999. Read Disclaimer notice.
All rights reserved. International Starch Institute, Science Park Aarhus, Denmark.

Keywords: laboratory method determination dry matter substance starch glucose maltose fructose syrup refraction refractive index