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Gao X, Ding C, Zhu A, Tian Y (2014) Carbon-dot-based ratiometric fluorescent probe for imaging and biosensing of superoxide anion in live cells

Each COA reports results from third-party laboratory analysis, including: High-performance liquid chromatography (HPLC) for purity, typically confirmed at 99% or higher Liquid chromatography mass spectrometry (LC-MS) for molecular identity and mass confirmation Sterility and endotoxin screening where applicable Chemical contaminant and residual solvent checks COAs are sourced from independent certified labs rather than in-house testing alone, giving researchers a verifiable record of molecular integrity for each batch

We found no differences between the preparation conditions tested nor an effect of time to deproteinization on stability of total GSH, suggesting that use of either heparin or EDTA during sample collection can prevent enzymatic degradation of GSH when samples are stored at 80 o C

doi: 10.3390/ijms24054254 4