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MALDI TOF‐TOF characterization of a light stabilizer polymer contaminant from polypropylene or polyethylene plastic test tubes
Author(s) -
Sachon Emmanuelle,
Matheron Lucrèce,
Clodic Gilles,
Blasco Thierry,
Bolbach Gérard
Publication year - 2010
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1687
Subject(s) - polypropylene , chemistry , polyolefin , stabilizer (aeronautics) , polyethylene , mass spectrometry , polymer , matrix assisted laser desorption/ionization , chromatography , mass spectrum , time of flight mass spectrometry , polymer chemistry , chemical engineering , desorption , organic chemistry , ionization , adsorption , mechanical engineering , ion , layer (electronics) , engineering
Disposable plasticware such as plastic test tubes are routinely used in all proteomics laboratories. Additives in polymers are used to protect them against oxygen or ultraviolet (UV) light degradation. Hindered amine light stabilizers (HALSs) are of utmost importance in modern polyolefin (polypropylene, polyethylene) stabilization. In this article, we demonstrate that the manufacturing polymeric agent: poly‐(N‐β‐hydroxyethyl‐2,2,6,6‐tetramethyl‐4‐hydroxy‐piperidinyl succinate), known as Tinuvin‐622 or Lowilite 62, from the HALS family, leaches from laboratory polypropylene or polyethylene plastic test tubes into the standard solvents for sample preparation. The analysis of these polluted samples by matrix‐assisted laser desorption/ionisation‐time of flight (MALDI‐TOF) mass spectrometry, in the positive mode, shows highly contaminated mass spectra, due to the high sensitivity of this technique. These contaminants have mass range and mass defect similar to those of peptides arising from the digestion of a protein in a conventional proteomics study. Therefore, they can be really harmful for proteomics studies, leading to misattributions, preventing any protein identification. In this article, an MS and MS/MS fingerprint of this pollutant is given and some pieces of advice to avoid it are proposed. Copyright © 2009 John Wiley & Sons, Ltd.