CPT® Code 82491

Deleted

Chromatography, quantitative, column (eg, gas liquid or HPLC); single analyte not elsewhere specified, single stationary and mobile phase

Chromatography is a sophisticated laboratory technique utilized for the separation of chemical components within a mixture. This process employs two distinct phases: a stationary phase and a mobile phase. In the context of column chromatography, the stationary phase is established by applying a thin layer of a liquid or polymer that contains the test sample onto a solid, inert support material. This support is then inserted into a column, which can be constructed from glass or metal, and is sealed to maintain the integrity of the sample during analysis. To enhance the efficiency of the separation process, the column may be subjected to controlled heating using an oven or similar device, which regulates the temperature throughout the procedure. The mobile phase, which can be either a gas or a liquid solvent, is introduced into the system, initiating the separation of the sample's components, known as analytes. The movement of these analytes through the column is influenced by their polarity, which determines the distance they travel in conjunction with the solvent. The CPT® Code 82491 is specifically designated for the quantitative analysis of a single analyte that is not specified elsewhere. This code is essential for accurately measuring the concentration of various substances within a sample, such as Coenzyme Q10, thiopurine metabolites, iodide, citalopram, strychnine, lipid peroxides (TBARS), cyclobenzaprine (Flexeril), buspirone (Buspar), pyridostigmine (Mestinon), bendiocarb, chloral hydrate, and phenazopyridine (Phenazo). In contrast, CPT® Code 82492 is utilized for the quantification of multiple analytes within a single sample, including substances like parathion, ketamine, and fractionated porphyrins.