MDL: EPA Reference Methods

MDL Lab 1 MDL Lab 2 MDL Lab 3

LIS 0.06 0.01 0.017

HIS 0.01 0.04 0.013

MDL2

Lab 1 Lab 2

LIS 0.004 0.000

HIS 0.000 0.002

MDL pooled (mg/L)

EPA Reference Hach 10206

LIS 0.03 0.06

HIS 0.02 0.05

ML pooled (mg/L)

EPA Reference Hach 10206

LIS 0.09 0.20

HIS 0.06 0.17

Average % Recovery (X):

EPA Reference Hach 10206

LIS 103.5% 99.0%

HIS 103.8% 94.6%

Between laboratory Std Dev (sb)

EPA Reference Hach 10206

LIS 0.043 0.005

HIS 0.023 0.036

Lab 1 Avg Lab 2 Avg Lab 3 Avg

EPA Reference

LIS 108% 99% 104%

HIS 106% 102% 104%

Hach 10206

LIS 100% 99% 99%

HIS 97% 90% 96%

Pooled within-laboratory Std Dev (sw)

EPA Reference Hach 10206

LIS 0.030 0.006

HIS 0.016 0.005

Lab 1 Std Dev Lab 2 Std Dev Lab 3 Std Dev

EPA Reference
LIS 0.0068 0.0522 0.0027

HIS 0.0179 0.0207 0.0018

Hach 10206

LIS 0.0062 0.0077 0.0025

HIS 0.0077 0.0034 0.0023

Precision Acceptance Criteria

F = √3.86 1.96468827

RSD EPA Reference Hach 10206

LIS 0.03 0.0

HIS 0.02 0.0

IPR QC @ 95% Conf Precision

EPA Reference Hach 10206

LIS 0.06 0.01 Use

HIS 0.03 0.01

Recovery Acceptance Criteria (sc)

EPA Reference Hach 10206

LIS 0.05 0.01

HIS 0.03 0.04

(1+1/m) 1.333333333

(1/4-1/n) 0

QC Acceptance criteria (IPR) Recovery

EPA Reference Hach 10206

Lower Limit (LIS) 88% 97%

Lower Limit (HIS) 95% 81%

Upper Limit (LIS) 119% 101%

Upper Limit (HIS) 112% 108%

Average Recovery

Matrix

EPA Reference

Lab 1 Lab 2 Lab 3

Average Percent Recovery 109 97.4 102

Standard Deviation 0.14 2.8 0.14

Overall mean recovery (X) 103

Between laboratory Std Dev (sb) 5.7

Pooled within-laboratory Std Dev (sw) 1.6
Hach 10206

Lab 1 Lab 2 Lab 3

Average Percent Recovery 96.0 94.3 95.1

Standard Deviation 0.28 0.42 1.7

Overall mean recovery (X) 95.1

Between laboratory Std Dev (sb) 0.85

Pooled within-laboratory Std Dev (sw) 1.0

Recovery Acceptance Criteria (sc) EPA Reference Hach 10206

6.55 0.98

Lower limit (%) Recovery Range

EPA Reference Hach 10206

Lower 85.7 92.6

Upper 120 97.7
MDL: Hach Method 10206

MDL Lab 1 MDL Lab 2 MDL Lab 3

LIS 0.10 0.09 0.03

HIS 0.04 0.08 0.08

MDL2

Lab 3 Lab 1 Lab 2 Lab 3

0.000 LIS 0.01 0.01 0.00

0.000 HIS 0.00 0.01 0.01

Std Dev squared Lab 1 Std Dev Lab 2 Std DevLab 3 Std Dev
0.0000 0.0027 0.0000 0.000925

0.0003 0.0004 0.0000 0.000252

0.0000 0.0001 0.0000 3.49E-05

0.0001 0.0000 0.0000 2.52E-05

Std Dev squared Lab 1 Std Dev Lab 2 Std DevLab 3 Std Dev Average

0.0200 8.0000 0.0200 2.6800
Std Dev squared Lab 1 Std Dev Lab 2 Std DevLab 3 Std Dev

0.0800 0.1800 2.8800 1.0467
Watertown

EPA 353.2

MDL Study: 0.075 mg/L Spike

Average (mg/L) Std. Dev. MDL ML Rounded ML

LIS 0.054 0.019 0.061 0.19 0.20

HIS 0.033 0.003 0.010 0.03 0.03

IPR Study: 5.0 mg/L Spike

% Recovery #1 % Recovery #2 % Recovery #3 % Recovery #4 Avg % Recovery

LIS 107.6% 106.8% 107.2% 108.4% 107.5%

HIS 107.4% 106.0% 107.4% 103.6% 106%

Matrix

Matrix (mg/L) MS (mg/L) MSD (mg/L) Average (mg/L) Avg Recovery

-0.03 5.43 5.44 5.435 108.7%

108.6 108.8 109

Hach Method 10206

MDL Study: 0.3 mg/L Spike

Average (mg/L) Std. Dev. MDL ML Rounded ML

LIS 0.286 0.030 0.10 0.30 0.30

HIS 0.208 0.011 0.04 0.11 0.10

IPR Study: 5.0 mg/L Spike

% Recovery #1 % Recovery #2 % Recovery #3 % Recovery #4 Avg % Recovery

LIS 100.4% 99.4% 99.2% 99.0% 99.5%

HIS 97.6% 97.6% 96.8% 96.0% 97.0%

Matrix

Matrix (mg/L) MS (mg/L) MSD (mg/L) Average (mg/L) Avg Recovery

-0.08 4.81 4.79 4.80 96.0%

96.2 95.8 96.0
Std. Dev.

0.01

0.02

Standard Deviation %RSD

0.14 0.13

Std. Dev.

0.006

0.008

Standard Deviation %RSD

0.28 0.29
Cedar Falls

SM 20th Ed. 4500-NO3 E

MDL Study: 0.075 mg/L Spike

Average (mg/L) Std. Dev. MDL ML Rounded ML

LIS 0.072 0.002 0.01 0.02 0.02

HIS 0.079 0.013 0.04 0.13 0.10

IPR Study: 5.0 mg/L Spike

% Recovery #1 % Recovery #2 % Recovery #3 % Recovery #4 Avg % Recovery

LIS 91.2% 101.5% 101.7% 101.7% 99.0%

HIS 98.6% 101.5% 103.0% 103.0% 102%

Matrix

Matrix (mg/L) MS (mg/L) MSD (mg/L) Average (mg/L) Avg Recovery

1.41 6.18 6.38 6.28 98.0%

95.4 99.4 97.4

Hach Method 10206

MDL Study: 0.3 mg/L Spike

Average (mg/L) Std. Dev. MDL ML Rounded ML

LIS 0.303 0.030 0.09 0.295 0.30

HIS 0.294 0.024 0.08 0.239 0.20

IPR Study: 5.0 mg/L Spike

% Recovery #1 % Recovery #2 % Recovery #3 % Recovery #4 Avg % Recovery

LIS 99.6% 98.6% 98.2% 99.8% 99.1%

HIS 90.4% 90.0% 90.8% 90.6% 90.5%

Matrix

Matrix (mg/L) MS (mg/L) MSD (mg/L) Average (mg/L) Avg Recovery

2.00 6.73 6.70 6.72 95.9%

94.6 94 94.3
Std. Dev.

0.05

0.02

Stdev %RSD

2.8 2.9

Std. Dev.

0.008

0.003

Stdev %RSD

0.42 0.45
Phoenix

EPA 300.0

MDL Study: 0.6 mg/L Spike

Average (mg/L) Std. Dev. MDL ML

LIS 0.582 0.005 0.017 0.054

HIS 0.583 0.004 0.013 0.042

IPR Study: 5.0 mg/L Spike

% Recovery #1 % Recovery #2 % Recovery #3 % Recovery #4

LIS 104.2% 104.0% 103.9% 103.5%

HIS 104.0% 103.9% 103.6% 103.7%

Matrix

Matrix (mg/L) MS (mg/L) MSD (mg/L) Average (mg/L)

0.07 5.18 5.17 5.18

102.2 102

Hach Method 10206

MDL Study: 0.3 mg/L Spike

Average (mg/L) Std. Dev. MDL ML

LIS 0.245 0.011 0.03 0.110

HIS 0.251 0.024 0.08 0.239

IPR Study: 5.0 mg/L Spike

% Recovery #1 % Recovery #2 % Recovery #3 % Recovery #4

LIS 98.8% 98.6% 98.6% 98.2%

HIS 96.6% 96.2% 96.2% 96.6%

Matrix

Matrix (mg/L) MS (mg/L) MSD (mg/L) Average (mg/L)

0.307 5.12 5.00 5.06

96.3 93.9
Rounded ML

0.10

0.10

Avg % Recovery Std. Dev.

103.9% 0.003

103.8% 0.002

Avg Recovery Stdev RSD

102.1% 0.14 13.9

102.1 0.137255

Rounded ML

0.10

0.20

Avg % Recovery Std. Dev.

98.6% 0.003

96.4% 0.002

Avg Recovery Stdev RSD

95.3% 1.7 1.79

95.1
Analyst Name: Facility Name:

City, State: Date: 

Drinking Water Source: EPA Reference Method:

Calibration Verification

0.30 mg/L NO3

-

-N standard solution

Hach Method 10206 (mg/L NO3

-

-N)

10.0 mg/L NO3

-

-N standard solution

Hach Method 10206 (mg/L NO3

-

-N)

MDL - Low Ionic Strength: Hach Method 10206 Expected Conc. 0.30 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

Replicate 5 (Abs) Replicate 6 (Abs) Replicate 7 (Abs)

MDL - Low Ionic Strength: EPA Reference Method Expected Conc. 0.075 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

Datasheet for the Validation of TNTplusTM Nitrate Reagent in Drinking Water

Note: This sheet must be printed off and filled out in hard copy form. 

Upon completion, please also fill out the electronic copy and submit both back to Hach Company. Yellow boxes must be filled out by the analyst.

A calibration report for the reference method must accompany this data sheet.

Grant Johnson TestAmerica

10/25/2010

0.288

0.096

Watertown, WI

9.69

0.285

WTI0197-02 Lab Water 353.2

0.101 0.106 0.097

0.050

0.1

0.097 0.036 0.048

0.284

0.050 0.051 0.049

0.299 0.345 0.264 0.260

0.260

0.096 0.099
MDL - High Ionic Strength: Hach Method 10206 Expected Conc. 0.30 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

Replicate 5 (Abs) Replicate 6 (Abs) Replicate 7 (Abs)

MDL - High Ionic Strength: EPA Reference Method Expected Conc. 0.075 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

IPR - Low Ionic Strength: Hach Method 10206 Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

IPR - Low Ionic Strength: EPA Reference Method Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

0.089 0.09 0.091 0.088

0.195 0.206 0.215 0.190

0.031 0.040 0.032 0.033

0.216 0.220 0.213

0.091 0.092 0.091

0.032 0.031 0.031

5.02 4.97 4.96

5.38 5.34 5.36 5.42

4.95

0.641 0.636 0.634 0.633
IPR - High Ionic Strength: Hach Method 10206 Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

IPR - High Ionic Strength: EPA Reference Method Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Drinking Water Sample Matrix

Hach Method 10206 (mg/L NO3

-

-N)

(Abs)

EPA Reference Method (mg/L NO3

-

-N)

Drinking Water Sample Matrix Spike

Hach Method 10206 (mg/L NO3

-

-N) (mg/L NO3

-

-N)

Replicate 1 Replicate 2

(Abs) (Abs)

Replicate 1 Replicate 2

EPA Reference Method (mg/L NO3

-

-N) (mg/L NO3

-

-N)

Replicate 1 Replicate 2

Drinking Water Matrix Characterization

Total Chlorine: (mg/L Cl2

)

Total Hardness: (mg/L CaCO3

)

Total Alkalinity: (mg/L CaCO3

)

pH:

5.37 5.18

4.80

0.625 0.625 0.621 0.616

4.88 4.88 4.84

280

7.35

5.37 5.30

-0.08

-0.03

4.81

5.43

0.06

4.79

5.44

0.055

<8.2

0.617 0.615
Date: 

0.30

0.075

0.0717 0.0727 0.0711

Replicate 5 (mg/L NO Replicate 6 (mg/L NO3 Replicate 7 (mg/L NO3

Replicate 1 (mg/L NO Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3 Replicate 4 (mg/L NO3

0.0692 0.0718 0.0743 0.0737

MDL - Low Ionic Strength: EPA Reference Method Expected Conc. (mg/L NO3

-

-N)

Replicate 5 (Abs) Replicate 6 (Abs) Replicate 7 (Abs)

Replicate 5 (mg/L NO Replicate 6 (mg/L NO3 Replicate 7 (mg/L NO3

0.099 0.104 0.102

0.284 0.324 0.313

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

0.103 0.106 0.097 0.097

Replicate 1 (mg/L NO Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3 Replicate 4 (mg/L NO3

0.322 0.341 0.269 0.266

MDL - Low Ionic Strength: Hach Method 10206 Expected Conc. (mg/L NO3

-

-N)

10.0 mg/L NO3

-

-N standard solution

Hach Method 10206 9.99 (mg/L NO3

-

-N)

Hach Method 10206 0.285 (mg/L NO3

-

-N)

Calibration Verification

0.30 mg/L NO3

-

-N standard solution

Drinking Water Source: Cedar Falls EPA Reference Method: SM 20th Ed. 4500-NO3 E

City, State: Cedar Falls, Iowa 9/29/2010

Analyst Name: Lorna Bormann Facility Name: TestAmerica Cedar Falls

A calibration report for the reference method must accompany this data sheet.

Datasheet for the Validation of TNTplusTM Nitrate Reagent in Drinking Water

Note: This sheet must be printed off and filled out in hard copy form.

Upon completion, please also fill out the electronic copy and submit both back to Hach Company. Yellow boxes must be filled out by the analyst.
0.30

0.075

5.0

5.0

5.0

5.0

Replicate 1 (mg/L NO Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3 Replicate 4 (mg/L NO3

4.93 5.075 5.15 5.15

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

IPR - High Ionic Strength: EPA Reference Method Expected Conc. (mg/L NO3

-

-N)

0.584 0.582 0.586 0.586

Replicate 1 (mg/L NO Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3 Replicate 4 (mg/L NO3

IPR - High Ionic Strength: Hach Method 10206 Expected Conc. (mg/L NO3

-

-N)

4.52 4.5 4.54 4.53

Replicate 1 (mg/L NO Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3 Replicate 4 (mg/L NO3

4.56 5.075 5.084 5.086

IPR - Low Ionic Strength: EPA Reference Method Expected Conc. (mg/L NO3

-

-N)

Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3

0.636 0.63 0.629 0.638

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

Replicate 4 (mg/L NO3

4.98 4.93 4.91 4.99

Replicate 1 (mg/L NO

IPR - Low Ionic Strength: Hach Method 10206 Expected Conc. (mg/L NO3

-

-N)

0.0889 0.0922 0.071

Replicate 5 (mg/L NO Replicate 6 (mg/L NO3 Replicate 7 (mg/L NO3

Replicate 1 (mg/L NO Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3 Replicate 4 (mg/L NO3

0.0625 0.0639 0.0887 0.0841

MDL - High Ionic Strength: EPA Reference Method Expected Conc. (mg/L NO3

-

-N)

0.096 0.098 0.102

Replicate 5 (Abs) Replicate 6 (Abs) Replicate 7 (Abs)

0.254 0.272 0.307

Replicate 5 (mg/L NO Replicate 6 (mg/L NO3 Replicate 7 (mg/L NO3

Replicate 2 (mg/L NO3 Replicate 3 (mg/L NO3

0.101 0.1 0.104 0.101

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

Replicate 4 (mg/L NO3

0.302 0.295 0.326 0.304

Replicate 1 (mg/L NO

MDL - High Ionic Strength: Hach Method 10206 Expected Conc. (mg/L NO3

-

-N)
(Abs)

(Abs) (Abs)

pH: 7.4

Total Alkalinity: 236.9 (mg/L CaCO3)

284.2 (mg/L CaCO3)

Total Chlorine: 0.23 (mg/L Cl2)

Total Hardness:

Replicate 1 Replicate 2

Drinking Water Matrix Characterization

EPA Reference Method 6.18 (mg/L NO3

-

-N) (mg/L NO3

-

-N)

Replicate 2

0.84 0.83

6.38

Replicate 1

Hach Method 10206 6.73 (mg/L NO3

-

-N)

Replicate 1 Replicate 2

6.70

Drinking Water Sample Matrix Spike

(mg/L NO3

-

-N)

(mg/L NO3

-

-N)

(mg/L NO3

-

-N)

0.296

EPA Reference Method 1.41

Drinking Water Sample Matrix

Hach Method 10206 2.00
Analyst Name: Facility Name:

City, State: Date: 

Drinking Water Source: EPA Reference Method:

Calibration Verification

0.30 mg/L NO3

-

-N standard solution

Hach Method 10206 (mg/L NO3

-

-N)

10.0 mg/L NO3

-

-N standard solution

Hach Method 10206 (mg/L NO3

-

-N)

MDL - Low Ionic Strength: Hach Method 10206 Expected Conc. 0.30 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

Replicate 5 (Abs) Replicate 6 (Abs) Replicate 7 (Abs)

MDL - Low Ionic Strength: EPA Reference Method Expected Conc. 0.60 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

0.576

0.576 0.586 0.586

0.096

0.094 0.094 0.094

0.577 0.585 0.588

0.244 0.244 0.239

City of Phoenix

0.092 0.096 0.095

300.0 - Ion Chromatography

0.257

9.980

0.225 0.255 0.246 0.259

Phoenix, Arizona 9-14 through 9-24-2010

Datasheet for the Validation of TNTplusTM Nitrate Reagent in Drinking Water

Note: This sheet must be printed off and filled out in hard copy form. 

Upon completion, please also fill out the electronic copy and submit both back to Hach Company. Yellow boxes must be filled out by the analyst.

A calibration report for the reference method must accompany this data sheet.

Kurt ILL TestAmerica - Phoenix
MDL - High Ionic Strength: Hach Method 10206 Expected Conc. 0.30 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

Replicate 5 (Abs) Replicate 6 (Abs) Replicate 7 (Abs)

MDL - High Ionic Strength: EPA Reference Method Expected Conc. 0.6 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 5 (mg/L NO3

-

-N) Replicate 6 (mg/L NO3

-

-N) Replicate 7 (mg/L NO3

-

-N)

IPR - Low Ionic Strength: Hach Method 10206 Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

IPR - Low Ionic Strength: EPA Reference Method Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

IPR - High Ionic Strength: Hach Method 10206 Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

Replicate 1 (Abs) Replicate 2 (Abs) Replicate 3 (Abs) Replicate 4 (Abs)

IPR - High Ionic Strength: EPA Reference Method Expected Conc. 5.0 (mg/L NO3

-

-N)

Replicate 1 (mg/L NO3

-

-N) Replicate 2 (mg/L NO3

-

-N) Replicate 3 (mg/L NO3

-

-N) Replicate 4 (mg/L NO3

-

-N)

5.2 5.197 5.181 5.187

4.83 4.81 4.81 4.83

0.62 0.618 0.617 0.619

0.632 0.631 0.631 0.629

5.21 5.199 5.196 5.177

0.585

0.574 0.586 0.585

4.94 4.93 4.93 4.91

0.096 0.094 0.094

0.585 0.582 0.581

0.093 0.095 0.094 0.101

0.254 0.239 0.24

0.233 0.246 0.241 0.303
Drinking Water Sample Matrix

Hach Method 10206 (mg/L NO3

-

-N)

(Abs)

EPA Reference Method (mg/L NO3

-

-N)

Drinking Water Sample Matrix Spike

Hach Method 10206 (mg/L NO3

-

-N) (mg/L NO3

-

-N)

Replicate 1 Replicate 2

(Abs) (Abs)

Replicate 1 Replicate 2

EPA Reference Method (mg/L NO3

-

-N) (mg/L NO3

-

-N)

Replicate 1 Replicate 2

Drinking Water Matrix Characterization

Total Chlorine: (mg/L Cl2)

Total Hardness: (mg/L CaCO3)

Total Alkalinity: (mg/L CaCO3)

pH:

184

80.79

8.11

5.00

0.653 0.638

0.362

5.18 5.17

0.307

0.102

0.07

5.12