Xylem YSI 2500 - Appendix B - Concentration Unit Conversion; Unit Conversion Tables and Examples

15-1
15 Appendix B – Concentration Unit Conversion
In the 2500 Analyzer Batch 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.
Chemistry
g/L
mg/L
(ppm)
mg/dL
%
(w/v)
mmol/L
mw
(g/mole)
Glucose (Dextrose)
1.80
1800
180
0.18
10.00
(180)
Glucose (Dextrose)
2.50
2500
250
0.25
13.89
(180)
L-Lactate
0.45
450
45
0.045
5.00
(89)
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
Linearity Test. Concentration Unit Conversion 15.1
Chemistry
g/L
mg/L
(ppm)
mg/dL
%
(w/v)
mmol/L
mw
(g/mole)
9.45
9,450
945
0.945
52.5
Glucose (Dextrose)
9.00
9,000
900
0.900
50.0
(180)
8.55
8,550
855
0.855
47.5
2.80
2,806
281
0.281
31.5
L-Lactate
2.67
2,672
267
0.267
30.0
(89)
2.54
2,539
254
0.254
28.5
NOTE: The linearity concentration ranges for each chemistry are shown (top to bottom) as upper limit, theoretical, and
lower limit for each of five concentration units.
FCN Membrane Integrity Test. Concentration Unit Conversion 15.2
Chemistry
g/L
mg/L
(ppm)
mg/dL
%
(w/v)
mmol/L
mw
(g/mole)
Glucose (Dextrose)
0.05
50
5
0.01
0.28
(180)
L-Lactate
0.03
30
3
0.01
0.34
(89)
NOTE: Use the values from the preceding tables only when calibrating with the appropriate YSI calibrator solution
Glucose (2776 or 2747) and L-Lactate (2776).