Nature

A Simple Online Internal Standard Calibration Strategy for Single-Particle Inductively Coupled Plasma Mass Spectrometry Based on Multielement Analysis

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...
Labroots

Optimizing Laboratory-Developed LC-MS/MS Tests: Proper Use of Internal Standards - Insights from Two Troubleshooting Case Studies

Stable isotope-labeled internal standards are widely used in laboratory-developed clinical mass spectrometry tests. An equal amount of these internal standards is added to all samples in a batch, ...
PharmTech

Photosensitivity of Internal Standard Valerophenone Used in USP Ibuprofen Bulk Drug and Tablet Assay and Its Effect on the Quantitation of Ibuprofen and Its Impurities

The results of forced degradation studies indicate the need for alternatives to valerophenone as an internal standard calibration for quantifying ibuprofen in bulk drug and tablet assay samples.
Pharmabiz

Routine calibration of analytical instruments

A variety of modern innovative analytical instruments, ranging from a simple apparatus to complex computerized systems, are used in the pharmaceutical sector to get accurate data and to help ensure ...