2.0 mg
2390 mV
4.0 mg
2250 mV
6.0 mg
2170 mV
10.0 mg
2070 mV
Table 1:
This table represents the recorded data for the measurement of the measured potential;
voltage, in the standard solutions with varying concentrations. The voltage was rounded to three
significant figures.
Figure 1:
The plot of voltage vs. log nitrate concentration of the standard solutions created in
lab. The correlation for the two is determined to be 0.9982 meaning there is a strong correlation
between the two. The line of best fit was used in the second part of the experiment to interpolate
the log of the concentrations of NA and NB samples.
Validation Samples
Voltage (mV)
NA
1
2210 mV
NA
2
2220 mV

NA
3
2210 mV
NB
1
2130 mV
NB
2
2120 mV
NB
3
2120 mV
Table 2:
This table represents the recorded data for the measurement of the measured potential;
voltage, in the validation samples, NA and NB. Each sample had triplicated measurements
represented by the subscript number next to each sample. The voltage was rounded to three
significant figures.
Validation
Samples
Log
Concentrations
Concentration
Nitrate (mg/L N)
Mean
(mg/L N)
Standard Deviation
(mg/L N)
NA
1
0.681
4.79
4.74
0.0685
NA
2
0.667
4.64
NA
3
0.679
4.78
NB
1
0.883
7.65
7.81
0.113
NB
2
0.898
7.91
NB
3
0.895
7.86
Table 3:
This table represents the calculated results of the validation samples of NA and NB. The
log concentrations of each sample was found by interpolating the calibration curve of the
standard solutions. The nitrate concentration was found by taking 10
log concentration
. The mean was
calculated using the equation x
m
=
∑
x
n
while the standard deviation was found using the
formula s
x
=
(
∑
d
2
n
−
1
)
1
/
2
.
Validation Samples (Class)
Mean (mg/L N)
Standard Deviation (mg/L N)
NA
4.76
0.78
NB
8.00
1.15
Table 4:
This table represents the class data for NA and NB. According to the class data, the
average of
NA
is 4.76 mg/L, with a standard deviation of 0.78 mg/L, and the average of
NB
is
8.00 mg/L, with a standard deviation of 1.15 mg/L.

Standard Solution Samples
Voltage (mV)
1.0 mg
2230 mV
2.0 mg
2110 mV
4.0 mg
1990 mV
6.0 mg
1910 mV
10.0 mg
1810 mV
Table 5:
This table represents the recorded data for the measurement of the measured potential;
voltage, in the standard solutions with varying concentrations of week 3. The voltage was
rounded to three significant figures.
Figure 2:
The plot of voltage vs. log nitrate concentration of the standard solutions created in
lab. The correlation for the two is determined to be 0.9991 meaning there is a strong correlation

between the two. The line of best fit was used in the second part of the experiment to interpolate
the log of the concentrations of NA and NB samples.
Environmental Samples
Voltage (mV)
W
1
1970 mV
W
2
1970 mV
W
3
1970 mV
B
1
1920 mV
B
2
1920 mV
B
3
1920 mV
F
1
1970 mV
F
2
1970 mV
F
3
1960 mV
Table 6:
This table represents the recorded data for the measurement of the voltage in the
environmental samples. W; Western Pond, B; Bluffs, and F; Formal Gardens. Each
environmental sample had triplicated measurements which is represented by the subscript next to
each sample. The voltage for each was rounded to 3 significant figures.

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- Summer '19
- Chemistry, Standard Deviation, NB, Nitrate, Standard Solutions