All Questions
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What Are Impurities in Pharmaceuticals?
Impurities are unwanted chemicals that may be present in drug substances or finished products as a result of manufacturing, storage, or handling. T...
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Serial Dilution: A Cornerstone in Analytical Chemistry
Serial dilution is a fundamental laboratory technique used to reduce concentration step by step. It ensures accurate analysis of pharmaceutical compou...
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HPLC Calibration – Key Parameters and Acceptance Criteria
High-Performance Liquid Chromatography (HPLC) is one of the most critical analytical techniques in the pharmaceutical industry. To ensure accuracy, re...
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LC-MS vs GC-MS in Pharmaceutical Analysis
1. Principle LC-MS (Liquid Chromatography–Mass Spectrometry): Separates analytes in the liquid phase using HPLC and detects them with a mass spect...
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Normal-Phase vs Reversed-Phase HPLC
One of the most important choices in chromatography method development is deciding between Normal-Phase (NP) and Reversed-Phase (RP) HPLC. The followi...
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Carryover – The Hidden Threat to Analytical Accuracy
In analytical science, precision is non-negotiable. Yet, one silent contaminant can distort results and jeopardize data integrity — carryover. Wh...
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Why Spike Impurities Below LOQ in Method Validation (Related Substances – Accuracy Studies)?
During HPLC method validation for related substances, spiking impurities at levels below the LOQ may seem unnecessary—since values below LOQ are “...
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HPLC baseline noise
When using Acetonitrile and water composition in the ratio 50:50 premixed and sonicated for 10mins and ran one injection of blank,it's look like ...
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Assay Simeticone
Hello, good morning. Can anyone help me a method for quantifying Simeticone using reverse-phase HPLC? Thanks you i'm avance...