Sintesis Selulosa Sitrat dari Selulosa Daun Nenas (Ananas comosus (L)Merr ) Melalui Reaksi Esterifikasi dengan Asam Sitrat Sebagai Pengadsorpsi Ion Kadmium (Cd2+)

LAMPIRAN

Lampiran 1 . Perhitungan Larutan Standar Cd2+
1. Larutan Induk Cd2+ 1000 ppm
Gram Cd2+ =

Ar Cd

Mr CdCl2

=

112
201,4

x gram CdCl2

x 0,897 gram

= 0,5006 gram
Larutan Induk 1000 ppm

ppm=

gram Cd 2+
1000 mL

x 1000 ppm
=

0,5006
500 mL

x 1000 ppm

= 1001 ppm ≈ 1000 ppm
2. Larutan Seri Standar Cd2+ 100 ppm
V1 x N1= V2 x N2
V1 x 1000 ppm = 250 mL x 100 ppm
V1 = 25 mL
3. Larutan Seri Standar Cd2+ 200 ppm
V1 x N1= V2 x N2

V1 x 1000 ppm = 250 mL x 200 ppm
V1 = 50 mL
4. Larutan Seri Standar Cd2+ 300 ppm
V1 x N1= V2 x N2
V1 x 1000 ppm = 250 mL x 300 ppm
V1 = 75 mL

5. Larutan Seri Standar Cd2+ 400 ppm
V1 x N1= V2 x N2
V1 x 1000 ppm = 250 mL x 400 ppm
V1 = 100 mL
6. Larutan Seri Standar Cd2+ 500 ppm
V1 x N1= V2 x N2
V1 x 1000 ppm = 250 mL x 500 ppm
V1 = 125 mL

Lampiran 2 . Perhitungan Daya Serap (%) Zat Hasil Reaksi
% Daya Serap =

Kadar Awal − Kadar Akhir

Kadar Awal

1. % Daya Serap Selulosa Hasil Isolasi
a. Selulosa-Larutan Standar 100 ppm
% Daya Serap

=

100 – 89,6752
100

x 100 %

= 0,103248 x 100 %
= 10,3248 %
b. Selulosa -Larutan Standar 200 ppm
% Daya Serap

=

200 – 170,5713
200

x 100 %

= 0,147143 x 100 %
= 14,7143 %
c. Selulosa -Larutan Standar 300 ppm
% Daya Serap

=

300– 273,7210
300

x 100 %

= 0,087596 x 100 %

x 100 %

= 8,7596 %
d. Selulosa -Larutan Standar 400 ppm
% Daya Serap

=

400 – 350,6309
400

x 100 %

= 0,123422 x 100 %
= 12,3422%
e. Selulosa -Larutan Standar 500 ppm
% Daya Serap

=

500 – 474,5672

500

x 100 %

= 0,063582 x 100 %
= 6,3582%

2. % Daya Serap Selulosa Sitrat
a. Selulosa sitrat-Larutan Standar 100 ppm
% Daya Serap

=

100 – 25,2128
100

x 100 %

= 0,747872 x 100 %
= 74,7872 %

b. Selulosa sitrat -Larutan Standar 200 ppm
% Daya Serap

=

200 – 98,7235
200

x 100 %

= 0,506382 x 100 %
= 50,6382%
c. Selulosa sitrat -Larutan Standar 300 ppm
% Daya Serap

=

300 – 232,7350
300

x 100 %

= 0,224216 x 100 %
= 22,4216 %

d. Selulosa sitrat -Larutan Standar 400 ppm
% Daya Serap

=

400 – 337,7189
400

x 100 %

= 0,155702 x 100 %
= 15,5702 %
e. Selulosa sitrat -Larutan Standar 500 ppm
% Daya Serap

=

500 – 435,5375
500

x 100 %

= 0,128925 x 100 %
= 12,8925 %

Lampiran 3. Hasil SEM Senyawa Pembanding (Thanh, N. 2009)

(a) Hasil SEM selulosa perbesaran 2500x

(b) Hasil SEM Selulosa Sitrat
perbesaran 2500x