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Ref. No. [UMCES] CBL 2015-011
ACT VS15-04
2
TABLE OF CONTENTS
EXECUTIVE SUMMARY
............................................................................................3
BACKGROUND AND OBJECTIVES
...........................................................................5
INSTRUMENT TECHNOLOGY TESTED
....................................................................6
PH SCALES
.................................................................................................................7
SUMMARY OF VERIFICATION PROTOCOLS
...........................................................8
A
NALYSIS OF
R
EFERENCE
S
AMPLES
............................................................................................ 8
L
ABORATORY
T
EST
...................................................................................................................... 9
F
IELD
T
ESTS
.............................................................................................................................. 10
RESULTS OF LABORATORY TEST
.........................................................................15
RESULTS OF MOORED FIELD TESTS
.....................................................................25
QUALITY ASSURANCE/QUALITY CONTROL
........................................................46
QUALITY CONTROL SAMPLES
...................................................................................................... 46
E
XTERNAL
Q
UALITY ASSURANCE AND QUALITY CONTROL ASSESSMENTS
................................ 49
REFERENCES
...........................................................................................................51
ACKNOWLEDGEMENTS
.........................................................................................53
APPENDIX I
..............................................................................................................54
APPENDIX II
............................................................................................................58