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Analytical Chemistry

Full characterization of all chemicals is required for an accurate assessment of risk, and it is our goal to identify all of the potential chemicals that could come out of your product. Utilizing multiple analytical methods, our team of chemistry experts works tirelessly to understand your materials, process and product to detect a full range of organic, semi-volatile and volatile chemicals, providing you with the data you need to make informed decisions and meet current regulatory requirements.

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This test is a type of infrared spectroscopy in which the sample is subjected to all the wavelengths in the region of interest at all times, instead of only a small portion at a time.
This method is used to determine the presence of trace metals by atomic absorption spectroscopy.
This refers to absorption spectroscopy or reflectance spectroscopy in the ultraviolet-visible spectral region or light in the visible and adjacent ranges. The absorption or reflectance in the visible range directly affects the perceived color of the chemicals involved.
This involves extraction of the medical device in water followed by analysis of subvisible particulates using a light obscuration particle counting method.

Wet Chemistry

One of the major inorganic anions found in the environment, the chloride ion, in the form of a salt, is an integral component of many isotonic and physiological solutions.
Conductivity is a physical test that measures the ability of an aqueous solution to carry an electric current.
Glutaraldehyde is used as a liquid chemical sterilant in the medical device industry and in hospital environments.
This USP semi-quantitative test determines whether the total level of metallic impurities that react with the sulfide ion, under test conditions, exceeds the heavy metals limit specified in the individual USP monograph. Results are reported as weight percent (wt%) lead, based on color-comparison.
The Karl Fischer reaction uses a coulometric titration to determine the amount of water in a sample.
Osmotic pressure is fundamentally related to all biological processes that involve diffusion of solutes or transfer of fluids through membranes.
The pH value represents the acidity or alkalinity of an aqueous solution or suspension.
These tests, designed to determine the physical and chemical properties of plastics and their extracts, are based on the aqueous extraction of the polymer.
This series of tests is designed to provide information about the physical and chemical characteristics of elastomeric (rubber) closures.
The modified version of the classic Lowry protein assay is used to determine the amount of saline-extractable protein associated with products made from natural rubber (e.g., latex gloves).
USP requirements for purified water include water conductivity and total organic carbon.
Total Organic Carbon (TOC) is a measure of the organic compounds (reported as carbon) present in water.
Total Dissolved Solids (TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid, typically minerals and salts.
Total solids is the term applied to the material residue left in a vessel after evaporation of the sample and its subsequent drying in an oven at a specified temperature, usually between 103°C and 105°C.
This method is designed to measure the turbidity by comparing the intensity of light scattered by an aqueous sample with the intensity of light scattered by a standard reference suspension under the same conditions.
Testing is based on each individual USP monograph.
USP requirements for water for injection include water conductivity and total organic carbon.

Physical Testing

According to current USP specifications, “absorbent gauze” is cotton or a mixture of cotton and rayon (not more than 53% by weight) that is in the form of a plain woven cloth conforming to the standards set forth in the monograph.
Flashpoint is used to determine the temperature at which a liquid or volatile solid gives off vapor sufficient to form an ignitable mixture with the air just above the surface of the sample within the test vessel.
The melting point of a chemical is the temperature at which a substance changes physical state from a solid to a liquid at normal atmospheric pressure.
This is a gravimetric method for determination of water.
This method is used to determine the residual calcium of demineralized bone and other tissue-based products.
The refractive index of various liquids is measured using a Reichert AR200 digital refractometer.
This test determines the total mineral content of a sample or extract when ignited to 800°C in a muffle furnace.
Specific gravity is the ratio of the density of a substance to the density of a referenced substance.
Viscosity is the internal resistance to flow exhibited by a liquid.