VITAMIN C EXCRETION RATE, CLASS DATA, 2005
12-May-05
Vitamin C excretion rate data was collected according to the protocol, yielding the following data.
The data has been sorted from lowest excreters to highest.
mL
urine urine iodine urine mg vit C
subject mL/hour sp grav avg titrated per hour
6 11 not done 0.733 3 3.18
13 30 not done 1 10 3.55
4 65 1.016 0.84 10 6.45 Median excretion rate: 10.9 mg/hour
10 37 1.025 1.53 10 6.69
17 103 1.008 0.577 10 7.02 9.7
12 48 1.020 1.31 10 7.43 8.1
3 57 1.024 1.2 10 8.08 7.4 14.7
8 85 1.014 0.97 10 9.75 7.0 13.4
2 275 1.009 0.37 10 12.03 3.5 6.7 12.9 16.3
14 83 1.019 1.31 10 12.85 3.2 6.5 12.0 15.8   27.3         50.9
1 100 1.032 1.13 10 13.36 5 10 15 20 25 30 35 40 45 50 55
11 175 1.011 0.71 10 14.69
16 195 1.007 0.687 10 15.83 mg vitamin C excreted per hour
15 160 1.011 0.86 10 16.26
5 315 1.011 0.733 10 27.29
prof 58 1.019 7.43 10 50.94
9 0 not done not done not done
18
Average: 106 1.016 1.34 13.46
Midline: 83 1.015 10.89
standard deviation: 89.9310602 0.399351 11.73469
0.43734
12.02685
URINE COLLECTION: DBF:
Time bladder was completely voided: 2:02
Time (one hour later) specimen collected: 3:02
Volume in mL of urine produced in one hour 100 mL
hydrometer reading: 1.019
TITRATION:
Aliquot volume of urine titrated: 10 mL (indicate if you use 5 mL aliquots)
Conversion factory of Iodine used: 1.182 mg vitamin C/mL iodine
titration #: I II III
finish 3.6 5.5 6.31
start 2.91 3.6 5.5
iodine used: 0.69 1.9 0.81
CALCULATION:
Average volume of iodine used/ 10 mL aliquot: 1.133333 mL iodine required
mg Vitamin C/10 mL aliquot of urine: 1.3396
Number of 10 mL aliquots produced in an hour: 10
mg of Vitamin C excreted in urine in one hour: 13.396