Chemical Analysis

Inductive Coupled Plasma Spectroscopy

Inductive Coupled Plasma SpectroscopyInductive Coupled Plasma Spectroscopy (ICP) is a useful technique for measuring trace metals in liquid solutions. The sample is aspirated into a plasma where the metal ions are excited and emit characteristic radiation. The radiation is analyzed using a patented CID detector, which has better capability than the largest photomultiplier-based polychromators. Typical applications include industrial and municipal waste streams, raw water, and inorganic materials.

MRA has developed proven preparation and ICP analytical techniques for analyzing inorganic powders. Our high-tech ICP with patented CID detector combines the speed, accuracy, and throughput of a simultaneous ICP with the flexibility of a sequential system. Excellent detection limits, enhanced resolution for complex matrices, and the ability to test multiple wavelength for each element simultaneously provide improved accuracy and precision in sample analysis.

Capabilities:

Our ICP system is capable to detect and analyze over 70 chemical elements with a few ppm level precision.

 

Classical Wet Chemistry

classical wet chemistryThe classical methods of wet chemical analysis include colorimetry, gravimetry and titrimetry. The process of colorimetry relies on changes in color to show qualitative chemical measurements and identify elements. The measurement most commonly used in colorimetry is absorbance/transmittance of light, using the theory that if a solute absorbs light of a particular wavelength, the absorbance is directly proportional to the concentration of substance in solution. Measuring absorbance of light by a sample can lead to information about concentration when a standard with the same absorbance and a known concentration is identified.

Traditional analyses for quantitative results includes gravimetry based on the measurement of mass and titrimetry (volumetric analysis) using a volume measurement of a liquid. Gravimetric analysis entails the measurement of solids precipitated and weighed from a sample after dissolution. A known amount of sample is weighed, dissolved, manipulated either chemically or physically to precipitate a compound, and the collected solids are weighed. The amount of constituent in the original sample is calculated from the mass of the precipitate and its chemical composition. Titration can be used to determine the concentration of a known reactant. A reagent, called the titrant, of known concentration and volume (standard solution) is used to react with a measured quantity of reactant, making it possible to determine the exact amount that has been consumed when the endpoint is reached. Titrations often use visual indicators, such as a color change in the reactant mixture, to indicate the endpoint of a reaction.

MRA Laboratories, Inc. has the expertise and fully-equipped laboratories to provide classical wet chemistry methods both for qualitative and quantitative analyses.

MRA Laboratories applies many various methods in our wet chemistry lab.

 

Gas Chromatography Mass Spectroscopy

Gas Chromatography Mass SpectroscopyGas Chromatography Mass Spectrometry (GC-MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a gaseous test sample. The gas chromatograph utilizes a capillary column to separate the molecules as the sample travels through the length of the column. The molecules are retained by the column and then elute from the column at different times. This allows the mass spectrometer downstream to capture, ionize, accelerate, deflect, and detect the ionized molecules separately. The mass spectrometer does this by breaking each molecule into ionized fragments and detecting these fragments using their mass-to-charge ratio. Applications of GC-MS include drug detection, fire investigation, environmental analysis, explosives investigation, and identification of unknown samples. Additionally, it can identify trace elements in materials that were previously thought to have disintegrated beyond identification.

Capabilities:

Our GC-MS system is capable to detect and analyze a wide range of organic substances.

For specific information concerning any analysis, please contact us.