Appendix B - Concentration Unit Conversion; Linearity Test. Concentration Unit Conversion; Fcn Membrane Integrity Test. Concentration Unit Conversion - Xylem YSI 2500 User Manual

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
Glucose (Dextrose)
Glucose (Dextrose)
L-Lactate
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
15.1

Linearity Test. Concentration Unit Conversion

Chemistry
Glucose (Dextrose)
L-Lactate
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.
15.2

FCN Membrane Integrity Test. Concentration Unit Conversion

Chemistry
Glucose (Dextrose)
L-Lactate
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).
g/L
1.80
2.50
0.45
? 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
g/L
9.45
9.00
8.55
2.80
2.67
2.54
mg/L
g/L (ppm)
0.05
0.03
mg/L
(ppm) mg/dL
1800 180
2500 250
450 45
mg/L
(ppm) mg/dL
9,450 945
9,000 900
8,550 855
2,806 281
2,672 267
2,539 254
%
mg/dL (w/v) mmol/L
50 5 0.01
30 3 0.01
15-1
%
(w/v) mmol/L
0.18 10.00
0.25 13.89
0.045 5.00
%
(w/v) mmol/L (g/mole)
0.945 52.5
0.900 50.0 (180)
0.855 47.5
0.281 31.5
0.267 30.0
0.254 28.5
mw
(g/mole)
0.28 (180)
0.34 (89)
mw
(g/mole)
(180)
(180)
(89)
mw
(89)