Ref. No. [UMCES] CBL 2015-012
ACT VS15-05
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
ESTS
.................................................................................................................... 9
F
IELD
T
ESTS
.............................................................................................................................. 10
RESULTS OF LABORATORY TEST
.........................................................................15
RESULTS OF MOORED FIELD TESTS
.....................................................................18
QUALITY ASSURANCE/QUALITY CONTROL
........................................................41
QUALITY CONTROL SAMPLES
...................................................................................................... 41
E
XTERNAL
Q
UALITY ASSURANCE AND QUALITY CONTROL ASSESSMENTS
................................ 44
REFERENCES
...........................................................................................................46
ACKNOWLEDGEMENTS
.........................................................................................48
APPENDIX I
..............................................................................................................49