Determination of pKa values of some auxins in methanol-water mixtures by reversed phase liquid chromatography and potentiometric methods
Yükleniyor...
Dosyalar
Tarih
2009
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Sociedade Brasileira de Quimica
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Os hormônios das plantas são de vital importância para o seu funcionamento normal. As auxinas são uma classe de fito-hormônios envolvidas em muitos aspectos do crescimento. Os ácidos indol-3-acético (IAA), indol-3-pirúvico (IPA) e indol-3-lático (ILA) são auxinas com funções biológicas estimulantes do processo de crescimento, tais como elongação e divisão. Neste estudo, os valores pKa de IAA, IPA e ILA em misturas de metanol-água a 30%, 40% e 50% (v/v) foram determinados usando potenciometria, cromatografia líquida (LC) e metodologia LC-DAD. Valores de pKa em água, preditos pelo método SPARC também foram investigados.
Plant hormones are of vital importance for the normal functioning of plants. Auxins are a class of phytohormones involved in many aspects of plant growth. Indole-3-acetic acid, (IAA), indole-3-pyruvic acid (IPA) and indole-3-lactic acid (ILA) are auxins with biological functions stimulating growth processes such as cell elongation and division. In this study, the pKa values of IAA, IPA and ILA in 30%, 40% and 50% (v/v) methanol-water mixtures were determined using potentiometry, liquid chromatography (LC) and LC-DAD methodology. Also, the pKa values in water predicted by the SPARC on-line calculator have been investigated.
Plant hormones are of vital importance for the normal functioning of plants. Auxins are a class of phytohormones involved in many aspects of plant growth. Indole-3-acetic acid, (IAA), indole-3-pyruvic acid (IPA) and indole-3-lactic acid (ILA) are auxins with biological functions stimulating growth processes such as cell elongation and division. In this study, the pKa values of IAA, IPA and ILA in 30%, 40% and 50% (v/v) methanol-water mixtures were determined using potentiometry, liquid chromatography (LC) and LC-DAD methodology. Also, the pKa values in water predicted by the SPARC on-line calculator have been investigated.
Açıklama
Anahtar Kelimeler
Dissociation Constants, LC, LC-DAD, Methanol-Water Mixtures, Plant Hormones, Potentiometry
Kaynak
Journal of the Brazilian Chemical Society
WoS Q Değeri
N/A
Scopus Q Değeri
Q3
Cilt
20
Sayı
1
Künye
Kelen, M., Şanlı, N. (2009). Determination of pKa values of some auxins in methanol-water mixtures by reversed phase liquid chromatography and potentiometric methods. Journal of the Brazilian Chemical Society, 20(1), 133-140.
