AN31 Determination of Anions in Acid Rain by Ion Chromatography
简介:INTRODUCTION
The increase in the acidity of wet and dry deposition
has been attributed to the increase of S02 and N02 emis-
sions from stationary and mobile sources. The problem of
acid rain has 简介:INTRODUCTION
The increase in the acidity of wet and dry deposition
has been attributed to the increase of S02 and N02 emis-
sions from stationary and mobile sources. The problem of
acid rain has reached dramatic proportions throughout
many regions of the United States, Canada, Europe, and
Japan. Monitoring of air and rain are essential for assess
.
mg the effects of pollutants on global ecology.
Ion chromatography (IC) offers the analyst the uniqu
advantage of selective and rapid determination of low
concentrations of anions in acid rain. The trend toward
decreasing anion concentrations in wet deposition for
certain areas of the United States! emphasizes the need for
the improved sensitivity that IC can provide over other
analytical methods. Chemically suppressed IC has secure
I 0 od . o t 0
bec f 0 hi h d
a pace m aCI ram mom ormg ause 0 Its g egree
of accuracy and reliability, and has been specified by the
United States Environmental Protection Agency (EPA) as
the method of choice for the determination of chloride
Phos phate nitrate and sulfate(CI- PO 3- NO -
SO2- )wet deposition samples}-4 Several studies employing IC
have been conducted to date,5-7
This application note describes the established ion
chromatographic method for the determination of anions i
rainwater samples extended to the use of microbore
columns and accessories. A rainwater standard from the
National Institute of Standards and Technology (NIST)
was analyzed, verifying the accuracy of the method.详细>