Overview
SCIEX kits are integrated reagent systems developed by SCIEX (a Danaher subsidiary) for mass spectrometry-based workflows. These kits standardize complex analytical processes, such as protein quantification or metabolite profiling, by providing pre-formulated buffers, internal standards, and step-by-step protocols. They are validated on SCIEX’s high-resolution LC-MS/MS platforms, ensuring method reproducibility across laboratories. The kits often target specific applications—for example, the iTRAQ® labeling kit for multiplexed proteomics or the LipidView™ software bundle for lipidomics. By reducing manual optimization, they accelerate throughput in research and industrial settings, particularly in biomarker verification and pharmacokinetic studies.
Physical and Chemical Properties
SCIEX kit components vary by application but typically include mass spectrometry-compatible solvents (e.g., HPLC-grade water), stable isotope-labeled peptides (for quantification), and digestion enzymes like trypsin. Lyophilized reagents exhibit extended shelf lives, while liquid components may require cold chain storage. Critical properties include low background interference (<1 ppm contaminants) and batch-to-batch consistency (CV <15%). For example, the SelexION® ion mobility kits feature phosphoric acid additives to enhance gas-phase separation. Compatibility with ESI and MALDI ionization is explicitly validated for each kit.
Main Applications
In pharmaceutical R&D, SCIEX kits enable absolute quantification of biologics (e.g., monoclonal antibodies) using signature peptides. Clinical labs employ kits like the TopDown Protein Assay for intact protein analysis in biomarker discovery. Food testing utilizes mycotoxin kits with pre-spiked standards for EU regulatory compliance. Forensic toxicology relies on kits with certified reference materials (CRMs) for drugs of abuse screening. Emerging applications include extracellular vesicle analysis using Exosome-Human CD9/CD63/CD81 kits, which immunocapture vesicles for downstream MS characterization.
Safety and Storage
Hazardous components (e.g., TFA in mobile phase kits) require fume hood handling and nitrile gloves. Lyophilized toxins (e.g., aflatoxin standards) must be stored in dedicated −80°C freezers with double containment. Kits containing enzymes (e.g., Pepsin for HDX-MS) are shipped with dry ice and lose activity after repeated freeze-thaw cycles. Users should monitor kit-specific expiration dates—critical for time-sensitive assays like phosphoproteomics, where phosphatase inhibitors degrade rapidly.
B2B Procurement Guide
Procurement teams should verify three key aspects: 1) Platform compatibility (e.g., QTRAP 6500+ requires specific MRM kits), 2) Regulatory status (IVD-CE marked kits for clinical use), and 3) Scalability (bulk purchasing discounts for 96-well format kits). Leading distributors like Fisher Scientific offer volume pricing, while direct SCIEX contracts may include method development support. For niche applications (e.g., glycoproteomics), check lead times—custom kits may require 6–8 weeks for production. Always request COAs (Certificates of Analysis) for critical QC parameters like peptide purity (>95%).
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