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Field/Laboratory/Industrial
Instruments, Controllers & Sensors
Multi-parameter Bench Meters
Please click above to view this range
pH, Reference, Conductivity, Redox,
Dissolved Oxygen, Ion Selective Electrodes, Calibration
Solutions,
Hollow Cathode
Lamps
and
Deuterium
Lamps
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What is Flame Photometry?
Flame photometry is an atomic emission method for the routine
detection of metal salts, principally Na, K, Li, Ca, and Ba.
Quantitative analysis of these species is performed by measuring the
flame emission of solutions containing the metal salts. Solutions
are aspirated into the flame. The hot flame evaporates the solvent,
atomizes the metal, and excites a valence electron to an upper
state. Light is emitted at characteristic wavelengths for each metal
as the electron returns to the ground state. Optical filters are
used to select the emission wavelength monitored for the analyte
species. Comparison of emission intensities of unknowns to either
that of standard solutions, or to those of an internal standard,
allows quantitative analysis of the analyte metal in the sample
solution.
Flame photometry is a simple, relatively inexpensive, high sample
throughput method used for clinical, biological, and environmental
analysis. The low temperature of the natural gas and air flame,
compared to other excitation methods such as arcs, sparks, and rare
gas plasmas, limit the method to easily ionized metals. Since the
temperature isn't high enough to excite transition metals, the
method is selective toward detection of alkali and alkali earth
metals. On the other hand, the low temperatures renders this method
susceptible to certain disadvantages, most of them related to
interference and the stability (or lack thereof) of the flame and
aspiration conditions. Fuel and oxidant flow rates and purity,
aspiration rates, solution viscosity, concomitants in the samples,
etc affect these. It is therefore very important to measure the
emission of the standard and unknown solutions under conditions that
are as nearly identical as possible.
What products do R.M.S Ltd
offer for Photometry Measurement?
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The all new BWB-1 Flame
Photometer offers simple and reliable measurements in Flame
Photometry offering the user the capability
to simultaneously
detect Sodium (Na) - Potassium (K) - Lithium (Li) - Calcium
(Ca) - Barium (Ba) and display of all 5 elements.
The BWB-1 Flame
Photometer is a high quality, high performance instrument,
employing modern technology to ensure simple and reliable
measurements. As it is supplied as a full package
including an air compressor (not affected by high humidity),
a gas regulator, filters for Na - K - Li - Ba and Ca, both
computer and auto-sampler compatible and finally offers
switchable voltage.
With
this in mind the user has no hidden costs! The Flame Photometer only requires the provision of either propane
or butane gas to enable it to be used straight out of its
package.
Please click here for
more information |
Please click picture
to enlarge |
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