Minimization of interferences in inductively coupled plasma mass spectrometry using on-line preconcentration

Technical Report · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6290605

Heithmar, E M; Hinners, T A; Rowan, J T; Riviello, J M

A semiautomated system is used to preconcentrate Ti, V, Mn, Fe, Co, Ni, Cu, Cd, and Pb, in order to remove high salt matrices. The preconcentration system accepts digests with acid concentrations equivalent to 0.8-1.4% HNO3, neutralizes them, and loads them onto a macroporous iminodiacetate resin. The alkali and alkaline-earth metals, along with deleterious anions such as chloride, are washed off the resin before and analyte metals are eluted with nitric acid. A total of 13 isotopes of the analytes are measured. An examination of the apparent concentration efficiencies, as well as the behavior of two internal standard elements added to the eluate stream, indicates that the elution front matrix enhances the inductively coupled plasma mass spectrometry response of the analytes. Investigation of the nature of the blank signals suggests that the detection limits of several of the isotopes could benefit by much larger preconcentration factors, while those of vanadium, copper, cadmium, and lead are currently limited by reagent purity and laboratory contamination. The preconcentration system is evaluated on several simple synthetic matrices, as well as on synthetic seawater and three wastewaters. Digestion of samples containing natural organic chelators is required.

• Research Organization: Lockheed Engineering and Sciences Co., Inc., Las Vegas, NV (USA)
• OSTI ID: 6290605
• Report Number(s): PB-91-117150/XAB; CNN: EPA-68-03-3245
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
54 ENVIRONMENTAL SCIENCES
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CADMIUM
CHELATES
CHEMICAL ANALYSIS
COBALT
COMPLEXES
COPPER
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON
ISOTOPES
LEAD
LIMITING VALUES
LIQUID WASTES
MANGANESE
MASS SPECTROSCOPY
METALS
MULTI-ELEMENT ANALYSIS
NICKEL
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
QUANTITY RATIO
RESINS
SAMPLE PREPARATION
SEAWATER
SPECTROSCOPY
TITANIUM
TRACE AMOUNTS
TRANSITION ELEMENTS
VANADIUM
WASTE WATER
WASTES
WATER