Show simple item record

Files in this item

Thumbnail

Item metadata

dc.contributor.authorKeiller, Lauren
dc.contributor.authorPatterson, Iain L. J.
dc.contributor.authorStewart, Dominic
dc.contributor.authorSmellie, Iain
dc.date.accessioned2023-03-01T09:30:06Z
dc.date.available2023-03-01T09:30:06Z
dc.date.issued2023-03-14
dc.identifier283441989
dc.identifierbed143d5-6bf8-48ed-a461-81265c19bbdb
dc.identifier85149140212
dc.identifier.citationKeiller , L , Patterson , I L J , Stewart , D & Smellie , I 2023 , ' A simple and inexpensive invisible ink system based on red cabbage extracts ' , Journal of Chemical Education , vol. 100 , no. 3 , pp. 1398-1403 . https://doi.org/10.1021/acs.jchemed.2c01032en
dc.identifier.issn0021-9584
dc.identifier.otherORCID: /0000-0002-5829-6487/work/130204500
dc.identifier.urihttps://hdl.handle.net/10023/27080
dc.description.abstractThe use of red cabbage (Brassica oleracea var. capitata F. rubra) extract as a pH indicator is a versatile and popular demonstration that is employed by educators in many schools and universities. Previous variations of this demonstration have used red cabbage extracts to prepare paper that changes color when solutions of acid or base are applied as “inks”. In this report, we highlight the ability of red cabbage extracts to function as invisible inks. Colorless solutions are prepared by bleaching anthocyanin extracts with aqueous sodium metabisulfite, and the resulting mixture can then be used to write hidden messages on paper. The invisible messages can be revealed by the addition of citric acid solution, or by using potassium aluminum sulfate (alum) as developers. The demonstration does not require specialist equipment or chemicals, and options to use additional plant sources to prepare the ink are described.
dc.format.extent6
dc.format.extent2750888
dc.language.isoeng
dc.relation.ispartofJournal of Chemical Educationen
dc.subjectHigh school/introductory chemistryen
dc.subjectFirst-year undergraduate/generalen
dc.subjectDemonstrationsen
dc.subjectAcid/basesen
dc.subjectAqueous solution chemistryen
dc.subjectPlanten
dc.subjectQD Chemistryen
dc.subjectNDASen
dc.subjectMCCen
dc.subject.lccQDen
dc.titleA simple and inexpensive invisible ink system based on red cabbage extractsen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. Centre for Higher Education Researchen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.identifier.doi10.1021/acs.jchemed.2c01032
dc.description.statusPeer revieweden


This item appears in the following Collection(s)

Show simple item record