Artículo de revista
Uncertainty of ozone measurements with the primary standard reference photometer (SRP45)
Fecha
2011-09-01Registro en:
Talanta, Vol. 86, p.71– 81, 2011.
0039-9140
Autor
Leiva Guzmán, Manuel
Araya C., Consuelo
Mancilla, Carlos
Norris, James E.
Seguel, Rodrigo
Institución
Resumen
A comparison of the ozone primary reference standard photometer serial number 45 (SRP45) against the
National Institute of Standards and Technology (NIST) instruments, serial number 0 (SRP0) and 2 (SRP2),
has been performed in order to establish the traceability and comparability of ozone measurements
made by the Chilean atmospheric science community. A complete uncertainty budget was developed
for SRP45, using a GUM approach. The results of the comparisons allow us to conclude that SRP45,
SRP0 and SRP2 are comparable according to internationals criteria over an ozone mole fraction range of
0 nmol mol−1 to at least 500 nmol mol−1. The official result for the validation of SRP45 is xSRP45
ozone
=
[0.013
+
0.99806xSRP2
ozone] nmol mol−1 with an expanded uncertainty of 2
×
(0.27)2 +
(1.18
×
10−2 ×
xozone)2 from
0 to 500 nmol mol−1.