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Structure analysis of a polymer additive using high-energy collision–induced dissociation mass spectra acquired by SpiralTOFTM/TOF

Introduction

Various kinds of additives are used in a polymer, such as an antioxidant, a light stabilizer, and an ultraviolet absorber. Because a polymer’s properties depend on the additives in the raw material, it is important to understand these additives. Matrix-assistance laser desorption/ ionization time-of-flight mass spectrometer (MALDI-TOFMS) JMS-S3000 SpiralTOF™ is widely used in polymer analysis. High-energy collision–induced dissociation (HE-CID) measurement with the TOF-TOF option is also useful in analyzing the structures of additives. SpiralTOF™ can achieve a high precursor ion selection with a revolution of 17 m. Fragmentation derived from HE-CID can be observed only due to the ions from post-source decay (PSD), these fragment ions can be eliminated by the four electrostatic sectors that constitute the spiral trajectory. In this Applications Note, we report on polymer structural analysis by compare fragmentation patterns in the product ion spectra of IRGANOX 1076 M+・ and [M+Na]+.

Experimental

For the sample, we used the additive IRGANOX 1076 (10 mg/ml in tetrahydrofuran [THF]) in a commercially available additive kit. For the matrix, we used 2,5-hydroxybenzoic acid (DHB; 20 mg/ml in THF). HE-CID measurements were carried out for all ion species (M+・ and [M+Na]+) confirmed by the mass spectrum, and the product ion spectrum was acquired.

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