YSI 2900 - 16. Appendix B - Concentration Unit Conversion

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16. Appendix B – Concentration Unit Conversion
In the 2900 Series Configure menu, you have the option to assign units of concentration. There are default values set
based on calibration solutions offered by YSI. Below is a table of unit conversions for these calibration solutions and other
concentrations of interest.
Chemistry
g/L
mg/L
(ppm)
mg/dL
%
(w/v)
mmol/L
mw
(g/mole)
Choline
0.18
175
18
0.018
1.68
(104)
Glucose (Dextrose)
2.50
2500
250
0.25
13.89
(180)
Ethanol
2.00
2000
200
0.20
43.48
(46)
Ethanol-HC
25.0
25000
2500
2.50
543.5
(46)
Galactose
6
2.50
2500
250
0.25
13.89
(180)
L-Glutamate
0.73
731
73
0.073
5.00
(146)
L-Glutamine
0.73
731
73
0.073
5.00
(146)
Glycerol
25.0
25000
2500
2.50
271.5
(92)
L-Lactate
0.45
450
45
0.045
5.00
(89)
Lactose
5.00
5000
500
0.50
14.62
(342)
Methanol
1.00
1000
100
0.10
31.25
(32)
Peroxide
6
0.60
600
60
0.06
17.65
(34)
Sucrose
5.00
5000
500
0.50
14.62
(342)
Xylose
20.0
20000
2000
2.00
133.3
(150)
Ammonium
0.50
500
50
0.05
27.8
(18)
Potassium
1.00
1000
100
0.10
25.6
(39.1)
If you are using a standard of a value not listed in the preceding table, refer to the example conversions below to help
calculate your unit of choice.
Example Conversions
Beginning with 2.50 g/L glucose, convert this to mg\L, then % and finally to mmol/L:
1. Multiply by unit conversion(s)
2. Cancel units common in “numerator” and “denominator”
3. Multiply numbers
? mg/L = 2.50 g/L
= (2.50 g/L)(1000 mg/g) = (2.50)(1000) mg/L = 2500 mg/L
? % (w/v) = 2.50 g/L
= (2.50 g/L)(0.1 L/dL) = (2.50)(0.1) g/dL = 0.250 g/dL
= 0.250 % (Note: g/dL is g/100ml or percent)
? mmol/L = 2.50 g/L
= (2.50 g/L)(1 mole/180 g)(1000 mmole/mole)
= (2.50)(1/180)(1000) mmole/L = 13.89 mmol/L
6
Denotes that YSI does not currently offer this standard value.