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High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
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High-Performance Liquid Chromatography: Introduction01:11

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
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Stability-Indicating RP-HPLC Method Development and Validation for Determination of Impurities in Loperamide

Sreenivas Pippalla1, Vaishnavi Chintala2

  • 1Sikkim Professional University Gangtok, Gangtok, Sikkim, India.

Biomedical Chromatography : BMC
|March 12, 2025
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Summary

A new quality by design (QbD)-based high-performance liquid chromatography (HPLC) method accurately quantifies impurities and degradants in loperamide hydrochloride (LPH) tablets. This validated stability-indicating method ensures product quality and supports routine manufacturing analysis.

Keywords:
RP‐HPLCloperamide hydrochloride (LPH)method developmentmethod validationquality by design (QbD)

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Area of Science:

  • Analytical Chemistry
  • Pharmaceutical Analysis

Background:

  • Loperamide hydrochloride (LPH) requires robust analytical methods for quality control.
  • Identifying and quantifying impurities and degradants is crucial for pharmaceutical product safety and efficacy.

Purpose of the Study:

  • To develop and validate a quality by design (QbD)-based, stability-indicating high-performance liquid chromatography (HPLC) method for loperamide hydrochloride (LPH) tablet impurities.
  • To establish a reliable method for routine quality analysis and stability studies.

Main Methods:

  • A QbD approach was employed to develop a high-resolution HPLC method.
  • The method utilized a specific gradient elution with a Zodiac C18 column.
  • Forced degradation studies (acidic, oxidative, thermal) were conducted to assess method stability-indicating properties.

Main Results:

  • The developed HPLC method achieved excellent peak resolution for eight known impurities and quantified three degradants.
  • Stress studies demonstrated LPH's sensitivity to various degradation conditions.
  • The method proved robust, with purity angles consistently below the threshold under forced degradation.

Conclusions:

  • The validated HPLC method is suitable for the accurate determination of impurities and degradants in LPH tablet dosage forms.
  • This QbD-based method supports routine quality control and stability testing in pharmaceutical manufacturing.