## 3 Results and Discussion
### Nutrient Concentrations from Preserved Samples
#### 3.2.2 Orthophosphate Results
\begin{table}
\begin{tabular}{l l l l l l l l} \hline \hline  & & \multicolumn{6}{c}{**DAY**} \\ \hline  & & 0 & 0.5 & 1 & 2 & 5 & 7 & 14 \\ \hline \multirow{7}{*}{_TTLE_} & High Temperature (\({}^{\circ}\)F) & 82 & 82 & 83 & 85 & 86 & 86 & 83 \\  & Low Temperature (\({}^{\circ}\)F) & 57 & 57 & 60 & 60 & 68 & 65 & 61 \\  & Average Temperature (\({}^{\circ}\)F) & 70 & 70 & 72 & 73 & 77 & 76 & 72 \\ \hline \multirow{7}{*}{_WATER_} & \multicolumn{6}{c}{_Control (no preservation)_} \\  & PO4\({}^{-}\) (mg/L) & 1.033 & 0.972 & 1.009 & 1.003 & 0.973 & 0.976 & 0.999 \\  & \% _change from baseline_ & _0.00\%_ & \(-\)5.91\% & \(-\)2.32\% & \(-\)2.90\% & \(-\)5.81\% & \(-\)5.52\% & \(-\)3.29\% \\ \hline \multirow{7}{*}{_TLE_} & \multicolumn{6}{c}{_EITched_} \\  & PO4\({}^{-}\) (mg/L) & 0.978 & 0.960 & 0.995 & 0.964 & 0.980 & 0.934 & 0.875 \\  & \% _change from baseline_ & \(-\)5.32\% & \(-\)7.07\% & \(-\)3.68\% & \(-\)6.68\% & \(-\)5.13\% & \(-\)9.58\% & \(-\)15.30\% \\ \hline \multirow{7}{*}{_WATER_} & \multicolumn{6}{c}{_EITyclic Acid_} \\  & PO4\({}^{-}\) (mg/L) & 1.015 & 0.993 & 1.024 & 0.854 & 0.998 & 1.024 & 1.013 \\  & \% _change from baseline_ & \(-\)1.74\% & \(-\)3.87\% & \(-\)0.87\% & \(-\)17.33\% & \(-\)3.39\% & \(-\)0.87\% & \(-\)1.94\% \\ \hline \multicolumn{7}{l}{_Sodium Omadine_} \\  & PO4\({}^{-}\) (mg/L) & 0.965 & 0.942 & 0.987 & 1.037 & 0.970 & 1.063 & 1.148 \\  & \% _change from baseline_ & \(-\)6.58\% & \(-\)8.81\% & \(-\)4.45\% & \(-\)0.39\% & \(-\)6.10\% & 2.90\% & 11.13\% \\ \hline \multicolumn{7}{l}{_Control (no preservation)_} \\  & PO4\({}^{-}\) (mg/L) & 1.026 & 0.938 & 0.967 & 0.962 & 0.936 & 0.966 & 0.999 \\  & \% _change from baseline_ & _0.00\%_ & \(-\)8.58\% & \(-\)5.75\% & \(-\)6.24\% & \(-\)8.77\% & \(-\)5.85\% & \(-\)2.63\% \\ \hline \multirow{7}{*}{_FUND WATER_} & \multicolumn{6}{c}{_EITched_} \\  & PO4\({}^{-}\) (mg/L) & 0.888 & 0.850 & 0.906 & 0.875 & 0.816 & 0.863 & 0.923 \\  & \% _change from baseline_ & \(-\)13.45\% & \(-\)17.15\% & \(-\)11.70\% & \(-\)14.72\% & \(-\)20.47\% & \(-\)15.89\% & \(-\)10.04\% \\ \hline \multicolumn{7}{l}{_Suffix Acid_} \\  & PO4\({}^{-}\) (mg/L) & 1.082 & 1.041 & 1.090 & 1.069 & 1.090 & 0.950 & 1.113 \\  & \% _change from baseline_ & _5.46\% & 1.46\% & 6.24\% & 4.19\% & 6.24\% & \(-\)7.41\% & \(\&\)8.48\% \\ \hline \multicolumn{7}{l}{_Sodium Omadine_} \\  & PO4\({}^{-}\) (mg/L) & 0.956 & 0.864 & 0.917 & 0.838 & 0.875 & 0.891 & 0.892 \\  & \% _change from baseline_ & \(-\)6.82\% & \(-\)15.79\% & \(-\)10.62\% & \(-\)18.32\% & \(-\)14.72\% & \(-\)13.16\% & \(-\)13.06\% \\ \hline \multicolumn{7}{l}{_Control (no preservation)_} \\  & PO4\({}^{-}\) (mg/L) & 1.095 & 1.056 & 1.067 & 1.135 & 1.028 & 1.043 & 0.965 \\  & \% _change from baseline_ & _0.00\%_ & \(-\)3.56\% & \(-\)2.56\% & 3.65\% & \(-\)6.12\% & \(-\)4.75\% & \(-\)11.87\% \\ \hline \multicolumn{7}{l}{_EITched_} \\  & PO4\({}^{-}\) (mg/L) & 1.001 & 0.987 & 1.014 & 1.032 & 1.014 & 0.965 & 0.991 \\  & \% _change from baseline_ & \(-\)8.58\% & \(-\)9.86\% & \(-\)7.40\% & \(-\)5.75\% & \(-\)7.40\% & \(-\)11.87\% & \(-\)9.50\% \\ \hline \multicolumn{7}{l}{_Suffix Acid_} \\  & PO4\({}^{-}\) (mg/L) & 1.059 & 1.009 & 1.056 & 0.975 & 0.951 & 0.987 & 1.069 \\  & \% _change from baseline_ & \(-\)3.29\% & \(-\)7.85\% & \(-\)3.56\% & \(-\)10.96\% & \(-\)13.15\% & \(-\)9.86\% & \(-\)2.37\% \\ \hline \multicolumn{7}{l}{_Sodium Omadine_} \\  & PO4\({}^{-}\) (mg/L) & 1.134 & 1.040 & 1.103 & 0.971 & 1.076 & 1.019 & 0.998 \\  & \% _change from baseline_ & _3.56\% & \(-\)5.02\% & \(0.73\%\) & \(-\)11.32\% & \(-\)1.74\% & \(-\)6.94\% & \(-\)8.86\% \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Daily high and low temperature that water samples were exposed to, as well as the orthophosphate concentrations and % change from the baseline concentration. The baseline concentration is the Day 0 Control for each water source. Figure 4: Comparison of the impact of the four preservation methods on orthophosphate concentration for Day 0–14. Error bars represent \(+/-\) one standard deviation from the mean.