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侯先生 13691497252 Preservatives are chemical compounds that are used in a wide range of applications to maintain overall product quality.1 For example, preservatives are used in foods, beverages, pharmaceuti¬cals, and personal care products. Some preservatives act as antimi¬crobial agents, some act as antioxidants, and some can perform both functions. To some extent, the ability of the chemical to act as a preservative depends on the environment, so factors such as the type of product, water content, pH, and storage conditions all need to be considered when selecting a preservative. Of the chemical compounds commonly used as preservatives, many of them can be effectively analyzed by high performance liquid chromatography (HPLC).2 Chromatographic techniques such as HPLC separate preservative compounds from the rest of the sample matrix, providing more accurate results compared to traditional techniques such as spectrophotometry. Because preser¬vatives include a number of different compound types, there are a variety of HPLC stationary phases, mobile phases, and detectors that can be used.
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