Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Naomi Richfield-Fratz"'
Publikováno v:
Journal of Liquid Chromatography & Related Technologies. 34:106-115
Specifications in the U.S. Code of Federal Regulations for the color additive FD&C Red No. 4 (Color Index 14700) limit the levels of the intermediates, 5-amino-2,4-dimethyl-1-benzenesulfonic acid (AMBSA) and 4-hydroxy-1-naphthalenesulfonic acid (HNSA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23cd5cfc1e71997e8d4dee9d116318f1
https://doi.org/10.1080/10826076.2010.526874
https://doi.org/10.1080/10826076.2010.526874
Autor:
Elizabeth A Cox, W Johnson, Naomi Richfield-Fratz, M Gunn, J King, R Beswick, F Penta, L Bille, G Gasper
Publikováno v:
Journal of AOAC INTERNATIONAL. 63:61-68
Eight laboratories participated in a collaborative study of a high performance liquid chromatographic procedure for determining sulfanilic acid, Schaeffer's salt, 4,4´-(diazoamino)-dibenzenesulfonic acid (DAADBSA), and 6,6´-oxybis(2-naphthalenesulf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f727dad0bf07ef5798a18bd2ba1cee56
https://doi.org/10.1093/jaoac/63.1.61
https://doi.org/10.1093/jaoac/63.1.61
Publikováno v:
Journal of AOAC INTERNATIONAL. 67:240-249
A reverse phase liquid chromatographic (LC) method is presented for determining intermediates, subsidiary colors, and 2 reaction by-products in FD&C Yellow No. 6. Gradient elution from 0.02M ammonium acetate to 60% methanol in 0.02M ammonium acetate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a041e574ce760236df925807688dc385
https://doi.org/10.1093/jaoac/67.2.240
https://doi.org/10.1093/jaoac/67.2.240
Publikováno v:
Journal of Chromatography A. 467:167-176
The unsulfonated aromatic amine 4-nitro-p-cresidine (2-methoxy-5-methyl-4-nitrobenzenamine) was identified as an impurity in the regulated color additive FD&C Red. No. 40. The compound was isolated from the water-soluble color by extraction with chlo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53ac0fb4e5204c1ae8cf7f273d64a873
https://doi.org/10.1016/s0021-9673(01)93961-5
https://doi.org/10.1016/s0021-9673(01)93961-5
Autor:
John E. Bailey, Naomi Richfield-Fratz
Publikováno v:
Journal of Chromatography A. 405:283-294
The free aromatic amine p-cresidine is determined at low ppb (10(9] levels in the regulated color additive FD&C Red No. 40. The determination involves chloroform extraction of p-cresidine and other unsulfonated impurities from the color additive, fol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6d597fe70949557728bc9c360485ca7
https://doi.org/10.1016/s0021-9673(01)81769-6
https://doi.org/10.1016/s0021-9673(01)81769-6
Autor:
R Young, G Gasper, R Bischof, D Shah, F Penta, Naomi Richfield-Fratz, J Gosselè, Sherry Mee Bell, Elizabeth A Cox, J King, R Beswick, A Goldberg, L Gibson, M Gunn, Foster D Mcclure, A Sutherland
Publikováno v:
Journal of AOAC INTERNATIONAL. 64:324-331
Nine laboratories participated in a collaborative study of an ion exchange high performance liquid chromatographic procedure for determining the intermediates and 2 reaction by-products in FD&C Red No. 40: cresidine sulfonic acid (CSA), Schaeffer’s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a902afa2c9d76692ca35ee3a0d5227f6
https://doi.org/10.1093/jaoac/64.2.324
https://doi.org/10.1093/jaoac/64.2.324
Publikováno v:
Journal of chromatography. 331(1)
Data are presented for the determination of parts-per-billion (10(9)) levels of aniline, benzidine, 4-aminobiphenyl (4-ABP) and 4-aminoazobenzene in the regulated color additive FD&C Yellow No. 6. The determination involves chloroform extraction of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e729cc55079183cd2ad026813cbb8c6
https://pubmed.ncbi.nlm.nih.gov/4044733
https://pubmed.ncbi.nlm.nih.gov/4044733
Autor:
Naomi Richfield-Fratz
Publikováno v:
Journal of AOAC INTERNATIONAL. 67:762-763
A thin layer chromatographic method is presented for separating the reaction by-product 1,3,6-pyrenetrisuIfonic acid (trisodium salt) (PTS) from D&C Green No. 8 (8-hydroxy-l,3,6-pyrenetrisulfonic acid). PTS is detected visually, extracted from the ad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29107c12f01f09ee48aad1b67e1acd19
https://doi.org/10.1093/jaoac/67.4.762
https://doi.org/10.1093/jaoac/67.4.762
Autor:
Naomi Richfield-Fratz
Publikováno v:
Journal of AOAC INTERNATIONAL. 67:844-845
4,4'-(Diazoamino)-bis(5-methoxy-2-methylbenzenesuIfonic acid), when present as a reaction by-product in FD&C Red No. 40, is shown to decompose rapidly in aqueous solutions of the color additive. The decomposition is halted by the addition of sodium b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35ec5a10bf3b553b40d832bac683bd06
https://doi.org/10.1093/jaoac/67.4.844
https://doi.org/10.1093/jaoac/67.4.844