Ion exchange - Spectrophotometric determination of PPB and sub-PPB Cd
- National Water Research Institute, Burlington, Ontario (Canada)
- Institute of Environmental Health Monitoring, Beijing (China)
Routine analyses of trace metals including cadmium are commonly carried out using atomic absorption spectrometry (AA) and inductively coupled plasma (ICP) atomic emission spectrometry. Separate sample preconcentration is required by AA and ICP analysis of low levels. Since ion chromatography (IC) technique is potentially cost-effective as recently shown for anions and cations, and is suitable for studying metals and their speciation, the authors decided first to test IC in investigating low-level Cd. It has been stated that a detection limit as low as 0.1 ppb Cd{sup 2+} is attainable by IC but Mn{sup 2+} would coelute, which is unacceptable in water analysis. Recently, Rubin and Heberling reported an IC method that separates Cd{sup 2+} and Mn{sup 2+}, but it is not very sensitive for sub-ppb Cd{sup 2+}. This study concentrated on developing an IC method which not only can separate Mn{sup 2+} from Cd{sup 2+} but also can detect down to 0.2 ppb limit set in various guidelines and objectives. As will be shown sub-ppb Cd{sup 2+}, as well as Co{sup 2+} and Mn{sup 2+} can be simultaneously analyzed.
- OSTI ID:
- 7167446
- Report Number(s):
- CONF-8809264--
- Journal Information:
- Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA), Journal Name: Preprints of Papers Presented at National Meeting, Division of Water, Air and Waste Chemistry, American Chemical Society; (USA) Vol. 28:2; ISSN 0099-7293; ISSN ACWCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
CADMIUM
CHELATES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COBALT
COMPLEXES
DATA
ELEMENTS
ELUTRIATION
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
ION EXCHANGE CHROMATOGRAPHY
MANGANESE
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SPECTROPHOTOMETRY
TRACE AMOUNTS
TRANSITION ELEMENTS
WATER