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Updated: May 16, 2025

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA
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Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids BPCA

Published on: May 16, 2016

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在氧化中含有高水平的 - 一个样本制备工件?

Nhung Dang1, Johan Mattsson1, Adam Lanebjer1

  • 1Research and development analytical department, Cambrex, Karlskoga, Sweden.

Journal of pharmaceutical and biomedical analysis
|May 14, 2025
PubMed
概括

是一种致癌物质,可以从氧化 (BPO) 的降解中形成. 使用KOH将BPO降解为酸的新方法准确地测量了BPO中的低含量,与标准USP方法不同.

关键词:
烯是一种烯.醇过氧化物是什么?在HS-GC-MS中使用.

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Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling...
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