PENGARUH BEBERAPA PERLAKUAN TERHADAP PENGURANGAN KADAR FORMALIN PADA TAHU YANG DITENTUKAN SECARA SPEKTROFOTOMETRI
Abstract: The treatments cases
of tofu by using hazardous chemicals (Formaldehyde) still common among in the
public, it is
necessary to tofu
handling that is
safe for the
public. It has
been conducted research on the
effects of some treatments on reducing levels of formaldehyde in 2 types of
tofu, that tofu I and tofu II, which is determined by UV-Vis spectrophotometry
at a wavelength 412.78 nm and temperature
at 40 °C.
First, tofu soaked
in formaldehyde solution
(300 mg /
L) for 24 hours, then washed, soaked and boiled. The
filtrate was reacted with Nash reagent. Yellow color formed was
measured at λ
412.78 nm. The
results showed that
there is a
decrease of content formaldehyde in the sample has 18.39%
tofu I and 22.63% for the tofu II after washed, 25.91% and 25.51% after
soaked, 63.21% and
72.02% after boiled.
Furthermore, tofu of
the market that allegedly contain
formaldehyde and then
washed, soaked and
boiled. The results
showed that there is
a decrease in
content formaldehyde in
the sample tofu
I and II
has 38.40% and
29.49% after washed, 52.17% and 53.22% after soaked, 87.32% and 85.42%
after boiled.
Penulis: Vinda Vriska Darman,
Zamzibar Zuki dan Yulizar Yusuf
Kode Jurnal: jpkimiadd150280
