Services for researchers
Inductively coupled plasma emission spectrometry analytical services
This analytical service offered
by the MU Soil Testing and Plant Diagnostic Services should greatly benefit the College
of Agriculture, Food and Natural Resources research programs.
We have acquired an Inductively
Coupled Argon Plasma Optical Emission Spectrometer ('ICP' or 'ICAP-OES'). An
ICP provides 'total' elemental analysis of materials in aqueous solution, typically
an acidic solution. Many different types of materials are suitable for analysis
by ICP including water, soil extracts, plant or animal tissue digests, food
and feed digests, chemical solutions, and many other materials that can be
brought into aqueous solution.
With this state of the art equipment we can provide quantitative determination
of 20 to 28 elements simultaneously in a solution with the detection limits
in the parts per million (ppm) ranges. In contrast to flame emission spectroscopy,
the plasma is not an oxidizing environment (like a flame) and consequently there
are fewer chemical reactions to confound the analysis. The very high temperature
of the plasma (10,000K) results in high emissions, minimizing the effects due
to self absorption and other interferences. Also, ICP has a large linear range
- around 4-6 orders of magnitude for most elements. This means that fewer dilutions
are required to accommodate samples with a wide range of concentrations. Most
elements found in soil extracts, plant tissue digests, whether macro, micro
or trace concentrations, can be easily determined by ICP (some examples: P,
K, Ca, Mg, Na, S, Zn, Fe, Cu, Mn, Mo, B, Al, Pb, Ni, Cd, Co).
The lab supports a range of standard extraction, digestion dry ash methods
to prepare plants, soil, water and wastewater samples for the ICP. Researchers
also can work with the lab to have samples prepared using their preferred analytic
methods if they are not already supported by the lab. Alternatively, you are
welcome to submit samples fully prepared for ICP analysis. Prepared samples
will have volume and sample matrix requirements. If you have a matrix unlike
our conventional standards, there is an additional charge for preparing matching
Call the lab for pricing
Submitting samples already prepared for analysis
can result in substantial savings. There are also volume discounts available.
The lab charges a $25 setup fee for all batches of samples submitted for ICP
analysis; the lab reserves the right to raise the setup fee to $50 if fewer
than 10 samples are submitted. Normally the turnaround time would be five
to 10 working days. Rush samples can be proceeded with an additional fee. The
lab maintains a quality assurance procedure; you are encouraged to have your
own quality checks including check samples, replicates, spiked samples and/or
blanks in your sample set for quality control.
I am available to answer
any questions you may have on:
- Method detection limits
- The best approach for
- Matrix requirements for client prepared samples
associated with standard or custom procedures
- Quality control procedures.