|
Measurement Standards |
Reference
Documents |
Best Measurement Capability |
Range |
Calibrated
Instruments |
|
pH standard including
Pt/Pt, hydrogen electrode |
IUPAC recommendation – 2002;
NIST special publication
260-53 |
0.006 pH |
3.5 – 10.0 pH |
pH-meters, glass electrodes, solutions |
|
Electrolytic conductivity standard |
NIST special publication
260-142 |
1%
0.1% |
5·10-4 - 5·10-3 S/m
5·10-3 – 10 S/m
|
Conductometers, conductivity cells and solutions |
|
GC, GC-MS, HPLC, AAS with flow injection system, UV-Vis spectrophotom. etc. |
Variety of specific documents |
Specific for every analyte and sample matrix, for every method |
0.01 ppb – 100% |
Analytical instruments, substances and materials |
|