# Commission Regulation (EEC) No 1764/86 of 27 May 1986 laying down minimum quality requirements for products processed from tomatoes under the production aid scheme, Division 6: Natural soluble solids

Extent: E+W+S+N.I.

The natural total soluble solid content is determined after the chloride content has been determined and added salt has been deducted. For every 1 % chloride, 1,13 degrees Brix or 0,0157 refractive index must be subtracted (at 20 °C). These corrections take account of the pre-existing natural salt content, which is fixed arbitrarily at 2 % of the total solid content.
TABLE 1
Correction of readings to be made when using a refractometer having a scale showing the sucrose content, for temperatures other than 20 °C ± 0,5 °C
Temperature °C
Soluble solid content shown on the scale in % (mm)
5
10
15
20
30
40
50
Corrections to be subtracted
15
0,25
0,27
0,31
0,31
0,34
0,35
0,36
16
0,21
0,23
0,27
0,27
0,29
0,31
0,31
17
0,16
0,18
0,2
0,2
0,22
0,23
0,23
18
0,11
0,12
0,14
0,15
0,16
0,16
0,15
19
0,06
0,07
0,08
0,08
0,08
0,09
0,09
Corrections to be added
21
0,06
0,07
0,07
0,07
0,07
0,07
0,07
22
0,12
0,14
0,14
0,14
0,14
0,14
0,14
23
0,18
0,2
0,2
0,21
0,21
0,21
0,21
24
0,24
0,26
0,26
0,27
0,28
0,28
0,28
25
0,3
0,32
0,32
0,34
0,36
0,36
0,36
TABLE 2
Percentage by mass of soluble solids (expressed as sucrose) in relation to the refractive index
Refractive index
Soluble solids (expressed as sucrose)
n 20 D
% (m/m)
1,333
0
1,3344
1
1,3359
2
1,3373
3
1,3388
4
1,3404
5
1,3418
6
1,3433
7
1,3448
8
1,3463
9
1,3478
10
1,3494
11
1,3509
12
1,3525
13
1,3541
14
1,3557
15
1,3573
16
1,3589
17
1,3605
18
1,3622
19
1,3638
20
1,3655
21
1,3672
22
1,3689
23
1,3706
24
1,3723
25
1,374
26
1,3758
27
1,3775
28
1,3793
29
1,3811
30
1,3829
31
1,3847
32
1,3865
33
1,3883
34
1,3902
35
1,392
36
1,3939
37
1,3958
38
1,3978
39
1,3997
40
1,4016
41
1,4036
42
1,4056
43
1,4076
44
1,4096
45
1,4117
46
1,4137
47
1,4158
48
1,4179
49
1,4201
50

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Source: https://www.legislation.gov.uk/eur/1986/1764/annex/division/2/division/6 (the official version)
Page: https://openlegislation.uk/eu-regulation-1986-1764/annex/division-2/division-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.