RSK Values for Orange Juice

Chemical - Physical Analysis

Standard Value

range

mean

min.

1,0450

1,045

1,055

1,046

 Relative Density  20°C

min.

11,18

11,18

13.54

11.41

Corrected Brix°

g/l

min.

116,8

116,8

142,9

119,4

Titratable Acidity (pH 7.0)

g/l

min.

8.0

8,0

12

9,5

expressed as Tartaric Acid

min.

106,7

106,7

160

126,7

expressed in mval/l

g/l

max.

3,0

-

-

-

Ethanol

g/l

max.

0,4

-

-

-

Volatile Acidity as Acetic Acid

g/l

max.

0,5

-

-

-

Lactic Acid

mg/l

min.

200

-

-

350

  L(+) Ascorbic Acid

g/l

max.

0.3

-

-

-

Essential Oils

g/l

min.

22

20

-

28

Glucose

g/l

min.

24

22

-

30

Fructose

max.

1,0

0,85

1,0

0,92

Glucose/Fructose Ratio

g/l

max.

45

-

47

33

Sucrose

max.

50

-

-

-

% Sucrose on Total Sugars

g/l

min.

26

24

37

28

Non-Sugar Extract

g/l

min.

3,5

2,9

4,8

4,0

Ash

min.

11,0

10,5

14,0

12,5

Ash Alcalinity

mg/l

max.

30

-

-

14

Sodium (Na)

mg/l

min.

1700

1400

2300

1900

Potassium (K)

mg/l

max.

110

60

120

80

Calcium (Ca)

mg/l

min.

90

70

150

100

Magnesium (Mg)

mg/l

max.

60

-

-

-

Chloride (Cl)

mg/l

max.

10,0

-

-

-

Nitrates (NO₃)

mg/l

min.

400

350

600

460

Phosphates (PO₄)

mg/l

max.

150

-

-

-

Sulfates (SO₄)

g/l

min.

8,0

7,6

11,5

9,4

Citric Acid

mg/l

min.

70

65

130

90

Isocitric Acid

max.

130

80

130

105

Citric/Isocitric Ratio

g/l

max.

2,5

1,1

2,9

1,7

L-Malic Acid

mg/l

min.

575

450

1300

800

Proline

min.

18

15

26

20

Formol (0,1 N NaOH/100ml)

min.

90%

Corrected Formolo

mg/l

max.

1000

500

1000

800

Glycosyl flavones (Davis)

Expressed as hesperidin

mg/l

max.

500

-

-

300

Water-soluble Pectin

expressed as galacturonic acid

RSK Values for Orange Juice

range (mmol/l)

mean

range (mg/l)

mean

FREE AMMINOACIDS

1.7

3,0

2,1

225

400

280

Aspartic Acid

0,10

0,30

0,16

12

36

19

Threonine

1,0

1,8

1,3

105

189

164

Serine

1,7

4.5

3,0

255

675

450

Asparagine

0.5

1,1

0.8

73

162

118

Glutamic Acid

n.n.

0,5

-

-

max. 73

-

Glutamine

3,9

11,3

7.0

450

1300

800

Proline

0,15

0,30

0,20

11

23

15

Glycine

0,7

1,5

1,1

63

135

99

Alanine

0,07

0,23

0,15

8

27

18

Valine

traces

0.03

-

-

max. 5

-

Methionine

0,025

0,065

0,045

3

9

6

Leucine

0,020

0,060

0,040

2,6

8

5

Isoleucine

0,025

0,10

0,050

4,0

18

9

Tyrosine

0.08

0.30

0,18

13

50

30

Phenylalanine

1,7

3.5

2,3

175

360

240

g-Aminobutirric Acid

0,025

0,10

0.06

3

13

8

Ornitine

0,15

0,40

0.20

22

58

29

Lysine

0.03

0,12

0,07

5

19

11

Histidine

2,5

6,0

4,0

435

1050

700

Arginine

max. 1,5

max. 26

Ammonia

max. 0.6

max. 37

Ethanolamine

RSK Values for Orange Juice

Special Data 

max. 15 mg/l

Total Carotenoids

max. 5%

b-carotene (% on total carotenoids)

max. 15%

Carotene Esters  (cryptoxantinesters) in % on total carotenoids

Pectic Substances expressed as Galacturonic Acid

max. 200 mg/l

Oxalate-soluble Pectin

max. 300 mg/l

Alkali-soluble Pectin