Performance Verification Statement for the Campbell Scientific Instruments pH Sensor

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Ref. No. [UMCES] CBL 2015-008
ACT VS15-01
2
TABLE OF CONTENTS
EXECUTIVE SUMMARY ............................................................................................3
BACKGROUND AND OBJECTIVES ...........................................................................5
INSTRUMENT TECHNOLOGY TESTED ....................................................................6
PH SCALES.................................................................................................................6
SUMMARY OF VERIFICATION PROTOCOLS ...........................................................7
ANALYSIS OF REFERENCE SAMPLES ............................................................................................ 8
LABORATORY TEST...................................................................................................................... 8
FIELD TESTS .............................................................................................................................. 10
RESULTS OF LABORATORY TEST .........................................................................15
RESULTS OF MOORED FIELD TESTS.....................................................................25
QUALITY ASSURANCE/QUALITY CONTROL ........................................................47
QUALITY CONTROL SAMPLES...................................................................................................... 47
EXTERNAL QUALITY ASSURANCE AND QUALITY CONTROL ASSESSMENTS ................................ 50
REFERENCES...........................................................................................................52
ACKNOWLEDGEMENTS .........................................................................................54
APPENDIX I..............................................................................................................55
APPENDIX II ............................................................................................................59