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4. Gravimetry: Gravimetric analysis involves the determination of the analyte's mass by measuring a change in mass before and after a chemical reaction or physical process. 5. Electrochemical methods: Electrochemical techniques, like voltammetry or potentiometry, use electrical measurements to determine the concentration of an analyte based on its electrochemical behavior. Quantitative testing plays a crucial role in various scientific and analytical fields, including pharmaceuticals, environmental analysis, clinical diagnostics, food and beverage industry, and quality control. Accurate quantification of analytes is essential for assessing product quality, ensuring safety, monitoring processes, and evaluating compliance with regulatory standards.

Quantitative testing can be performed using various techniques, depending on the nature of the analyte and the requirements of the analysis. Some common quantitative method measures the absorbance or transmission of light by a sample at a specific wavelength, allowing for the determination of analyte concentration based on a calibration curve. 2. Titration: In titration, a solution of known concentration (titrant) is added to the sample until a chemical reaction reaches completion. The volume of titrant required to reach the endpoint is used to calculate the analyte concentration. 3. Chromatography: Chromatographic testing methods include: 1. Spectrophotometry: This techniques, such as high-performance liquid chromatography (HPLC) or gas chromatography (GC), can be utilized for quantitative analysis by measuring the peak area or peak height of the analyte in comparison to calibration standards.

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