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: jpkimiadd150279
