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Ooh, menurut pembacaan aku, Penunjuk Semesta (Universal Indicator) terdiri daripada beberapa bahan, bukan satu bahan kimia jer. Dan lain company, komposisi bahan2 kimia dlm Penunjuk Semesta diorang ada beza2 skit. Tambahan lagi, kandungan Indicator diorang di-patent-kan. Means, aderla bahan secret dlm tu yg diorang tak nak bagitau...
Tapi, "A universal indicator is typically composed of water, methanol, propan-1-ol, phenolphthallien sodium salt, methyl red sodium salt, phenol,4,4'-(3h-2,1-benzoxathiol-3-ylidene)bis2-bromo--methy l-6-(1-methylethyl)-, s,s-dioxide, monosodium salt, and phenol,4,4'-(3h-2,1-benzoxathiol-3-ylidene)bis5-methyl2-(1-m ethylethyl)-, s,s-dioxide, monosodium salt."
Source: Wiki
[ Last edited by meitantei at 19-11-2007 07:27 PM ] |
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