Spectroscopy E-Books
The selection of analytical methods for gas chromatography (GC)-amenable pesticides is often based on requirements for sensitivity and selectivity for regulatory needs or other monitoring requirements. Methods with both electron ionization (EI) and negative chemical ionization (NCI) are often required to cover the full range of GC–amenable pesticides at trace levels. Pesticides fragment easily in EI and CI sources such that the molecular ion is often low in abundance. NCI can provide added selectivity and sensitivity over EI methods. NCI is most commonly used in selected-ion monitoring mode. The lack of availability of parent ions for collision-induced dissociation for tandem mass spectrometry (MS) can limit the feasibility of GC–MS-MS for pesticides that significantly fragment in the ion source. Options for improving sensitivity by using of large-volume cold on column or programmable temperature vaporizer injections are presented. Read more
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Best of the Week: Hawaii’s Hidden Geology, Waters Announces Software Update
May 9th 2025Top articles published this week include an announcement from Waters Corporation, a news story about the hidden geology of the Big Island of Hawaii, the latest “IR Spectral Interpretation” column, which focuses on analyzing carbonyl compounds, and wearable spectroscopy sensors.
New AI Model Accelerates Infrared Imaging for Protein Analysis, Study Reveals
May 7th 2025A new study led by Ayanjeet Ghosh of the University of Alabama presents a transformative approach to analyzing infrared (IR) imaging data, with promising implications for neurodegenerative disease research.
Wearable fNIRS Sensor Tracks Cognitive Fatigue in Real Time
May 7th 2025Researchers have developed a wireless, wearable brain-monitoring device using functional near-infrared spectroscopy (fNIRS) to detect cognitive fatigue in real time. The miniaturized system enables mobile brain activity tracking, with potential applications in driving, military, and high-stress work environments.