Volume, Weight Conversions, Sulfur Dioxide And Ph Chemistry Reference Sheet
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1Volume Conversions:
Weight Conversions:
Equivalent Units:
1 mL = 0.035 fl oz
1 g = 1000 mg
1 g/L
= 0.10 g/100 mL
1 fl oz = 30 mL
1 kg = 1000 g = 2.2 lb
= 100 g/hL
1 L = 1000 mL
1 lb = 454 g = 0.4536 kg
= 100 mg/100 mL
1 L = 0.2642 gal
10 k = 22 lb
= 1000 mg/L
1 gal = 3785 mL = 3.785 L
1 metric ton = 1000 kg
= 1000 ppm
1 hL = 100 L = 26.4 gal
1 metric ton = 2205 lb
= 1.0 mg/mL
25 hL = 660 gal
1 US ton = 907 kg
= 0.1% (wt/vol)
1 US ton = 2000 lb
1 L = 33.8 oz = 1000 mL
1 g/hL = 1 g/26.42 gal
1 gal = 128 oz = 3785 mL = 3.78 L
1 lb = 16 oz
= 0.038 g/gal
1 qt = 32 oz = 946 mL = 0.946 L
1 oz = 28. 35 g
= 0.084 lb/1000 gal
1 pt = 16 oz = 473 mL = 0.473 = 0.473 L
1 g = 0.03572 oz
1 cup = 8 oz = 237 mL
4 oz = 118 mL
2 oz = 59 mL
1 oz = 29.57 mL
Potassium Metabisulfite Additions:
Other Useful Conversions:
1 ppm = 1 mg/L
Formula for PMBS addition:
1 °Brix = 1 % sugar (wt/vol)
(gallons of wine) x (3.785) x (ppm of addition) = grams of PMBS to add
1 barrel = 60 gal = 227 L
(1000) x (0.576)
1 lb/1000gal = 454 g/1000gal = 120 mg/L = 27.2 g/barrel = .0120g/L
3.785 is the conversion from gallons to liters
1 kg/hL = 1000 g/hL = 10,000 mg/L = 2.271 kg/barrel = 10 g/L
1000 converts mg/L (ppm) to g/L
0.576 is the fraction of SO
in PMBS
2
Sulfur Dioxide and pH:
This formula can be simplified to:
(gallons of wine) x (ppm of addition) x (0.0066) = grams of PMBS to add
Table of molecular SO
concentration over pH
2
Preparing a Strong 10% Stock Solution:
% of Free
Sulfur
ppm free
ppm free
Dissolve 10 grams of Potassium Metabisulfite into 100 mL of water. For
Molecular
for 0.8
for 0.5
additions of sulfite into large lots, use the information provided in the following
pH
SO
Molecular
Molecular
table.
2
10% Solution of Metabisulfite
2.90
7.5
11
7
2.95
6.6
12
7
(Desired final SO
concentration in ppm)
2
3.00
6.1
13
8
Must/Wine
10
20
25
30
40
50
75
3.05
5.3
15
9
(gallons)
(Add milliliters of 10% solution)
3.10
4.9
16
10
1
0.6
1.3
1.6
2.0
2.6
3.3
4.9
3.15
4.3
19
12
5
3.3
6.6
8.2
9.9
13.1
16.4
24.6
3.20
3.9
21
13
10
6.6
13.1
16.4
19.7
26.3
32.9
49.3
3.25
3.4
23
15
25
16.4
32.9
41.1
49.3
65.7
82.1
123.2
3.30
3.1
26
16
50
32.9
65.7
82.1
98.6
131.4
154.3
246.4
3.35
2.7
29
18
3.40
2.5
32
20
Preparing a Weak 3% Stock Solution:
3.45
2.2
37
23
Dissolve 3 grams of Potassium Metabisulfite into 100 mL of water. For
3.50
2.0
40
25
additions of sulfite into large lots, use the information provided in the following
3.55
1.8
46
29
table.
3.60
1.6
50
31
3% Solution of Metabisulfite
3.65
1.4
57
36
(Desired final SO
concentration in ppm)
2
3.70
1.3
63
39
Must/Wine
10
21
33
43
65
3.75
1.1
72
45
(gallons)
(Add tablespoons of 3% solution)
3.80
1.0
79
49
1
3.85
0.9
91
57
0.15
0.32
0.50
0.66
1.00
3.90
0.8
99
62
5
0.75
1.60
2.50
3.30
5.00
3.95
0.7
114
71
10
1.50
3.20
5.00
6.60
10.00
4.00
0.7
125
78
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