Title : Dicarboxylic degradation products of nonylphenol polyethoxylates: synthesis and identification by gas chromatography-mass spectrometry using electron and chemical ionization modes.

Pub. Date : 2004 Dec 17

PMID : 15633752






4 Functional Relationships(s)
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1 In CI-MS, the main ion peaks of dm-CA5-, dm-CA6-, dm-CA7-, and dm-CA8P1EC after methylation were at m/z= 129, 143, 157, and 171, respectively, corresponding to the loss of methyl phenoxyacetate from [M+ H]+; meanwhile significant peaks were detected at 321, 335, 349, and 363, corresponding to the loss of the trimethylsilanol after trimethylsilylation. Phenoxyacetates carbonic anhydrase 5A Homo sapiens
2 In CI-MS, the main ion peaks of dm-CA5-, dm-CA6-, dm-CA7-, and dm-CA8P1EC after methylation were at m/z= 129, 143, 157, and 171, respectively, corresponding to the loss of methyl phenoxyacetate from [M+ H]+; meanwhile significant peaks were detected at 321, 335, 349, and 363, corresponding to the loss of the trimethylsilanol after trimethylsilylation. trimethylsilanol carbonic anhydrase 5A Homo sapiens
3 The potential for the identification and quantification of individual branched carboxyalkyl isomeric mixtures of CA5-, CA6-, CA7-, and CA8P1EC metabolites based on corresponding dm-CA5-8P1ECs revealed the advantage of the GC-CI-MS although the detection limits in CI were clearly higher than those in EI. carboxyalkyl carbonic anhydrase 5A Homo sapiens
4 The potential for the identification and quantification of individual branched carboxyalkyl isomeric mixtures of CA5-, CA6-, CA7-, and CA8P1EC metabolites based on corresponding dm-CA5-8P1ECs revealed the advantage of the GC-CI-MS although the detection limits in CI were clearly higher than those in EI. carboxyalkyl carbonic anhydrase 5A Homo sapiens