What are the current methods for the extraction of dyes from plants?
What are the types of plants that can be used as pH indicator or are able to absorb heavy metal ions?
what are the mechansims as to how plants react to the absorption of heavy metal ions?
what are the types of instrumental techniques that can be used to detect metal ions, e.g. ion chromatography?
2006-08-01 00:37:50 · 2 answers · asked by doreen 1 in Science & Mathematics ➔ Chemistry
most current dyes are synthetic because plant based dyes fade quickly if you wash them.
pH indicator is read cabbage. tomatoes etc. pick up heavy metals (Pb, Hg) easily and store them in their fruit.
for the rest i'm gonna leave you to do your own homework. look up metallothyins (sp?)
2006-08-01 07:47:19 · answer #1 · answered by shiara_blade 6 · 0⤊ 0⤋
Currently plants are rarely used to extract dyestuffs. Nearly all dyes are now synthetically produced. Plants are generally boiled with water or alcohol to extract the colours required.
2006-08-01 01:46:04 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋