DAFTAR PUSTAKA
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Lampiran A.
Data hasil percobaan pengaruh pH larutan terhadap pembentukan kompleks Cr-PDC
Absorban.detik No. pH Larutan Cr(VI)
1 2 Rata-rata 1 1,02 0,016 0,024 0,020 2 2,03 0,173 0,161 0,167 3 3,07 0,325 0,331 0,328 4 3,99 0,440 0,451 0,446 5 5,17 0,354 0,373 0,363 6 6,20 0,184 0,184 0,185 7 6,95 0,042 0,037 0,040 8 8,17 0,028 0,030 0,029
Lampiran B
Data hasil percobaan pengaruh jumlah larutan APDC yang ditambahkan Absorban.detik
No. Jumlah larutan APDC (3 g/L)
( mL ) 1 2 Rata-rata 1 2 0,206 - 0,206 2 3 0,331 0,352 0,342 3 4 0,431 0.431 0,431 4 5 0,426 0,432 0,429 5 6 0,433 0,423 0,428
Lampiran C
Data pembuatan kurva kalibrasi Cr(VI) No. Konsentrasi standar Cr(VI)
(ppb) Absorban.detik Keterangan 1 10 0,196 2 20 0,236 3 30 0,392 4 40 0,483 Y=0,0127X r = 0,9626
Data hasil percobaan retensi kompleks Cr-PDC terhadap filter selulosa asetat Cr ditemukan Konsentrasi Cr awal ( µg/L) Absorban.detik Konsentrasi ( µg/L) Perolehan kembali ( % ) 50 0,494 38,90 78 50 0,491 38,66 77 50 0,506 39,92 80 50 0,507 39,84 80 Rata-rata 79 SD 2 Perhitungan :
- % Perolehan kembali = ( Kons. Cr ditemukan ÷ Kons. Cr awal ) x 100 % = ( 38,90 ppb ÷ 50 ppb ) x 100 %
= 78 %
- Standar deviasi (SD) = √ ∑ (Xi – Xrata-rata )2/( n-1)
= √{(78-79)2 + (77-79)2 + (80-79)2 + (80-79)2}/ 3 = 2 (pembulatan)
Lampiran D
Data hasil percobaan pengaruh jumlah larutan Ni yang ditambahkan kedalam 100 mL larutan Cr(VI) 50 µg/L
No. Penambahan larutan Ni (II) 1 g/L ( mL ) Absorban.detik 1 0 0,494 2 0,1 0,609 3 0,2 0,694 4 0,3 0,705 5 0,6 0,677
Lampiran E
Data kurva kalibrasi larutan standar Cr(VI) No. Konsentrasi standar Cr(VI)
(ppb) Absorban.detik Keterangan 1 5 0,139 2 10 0,301 3 15 0,470 4 20 0,591 Y=0,03012X r = 0,9974
Data hasil percobaan pengaruh konsentrasi larutan Cr(VI)
Cr ditemukan No. Konsentrasi larutan Cr(VI) ( µg/L) Absorban.detik Konsentrasi ( µg/L) Perolehan kembali ( % ) 1 5 0,139 4,61 92 2 10 0,279 9,26 93 3 15 0,484 16,07 107 4 20 0,359 11,91 60 5 30 0,555 18,34 61 6 40 0,510 16,93 42
Lampiran F
Data kurva kalibrasi larutan standar Cr(VI)
No. Konsentrasi standar Cr(VI) (ppb) Absorban.detik Keterangan 1 1 0,001 2 5 0,028 3 10 0,105 4 15 0,142 Y=0,0096X r = 0,9461
Data hasil percobaan pengaruh matriks contoh kain
Konsentrasi Cr(VI) (µg/L) Faktor Prakonsentrasi ( P ) Kons. Cr(VI) teoritis (µg/L) Konsentrasi Cr(VI) ditemukan (µg/L) Perolehan kembali ( % ) 5 10 50 47,12 94 5 10 50 48,12 96 5 10 50 47,50 95 Rata-rata 95 SD 1 Perhitungan % KV : % KV = (SD ÷ Hasil rata-rata) x 100 %
Lampiran G
Data penentuan limit deteksi
Absorban.detik No. Blanko (AB) Std Cr(VI) 5 µg/L Keterangan 1 0,073 0,109 2 0,068 0,113 3 0,067 0,114 4 0,061 5 0,059 6 0,058 7 0,059 8 0,058 9 0,056 10 0,054 Rata-rata 0,061 0,112 Perhitungan
LD = {[(AB)rata-rata+ 3 SD(AB)]/(AStd)} x [Std]
0,061 + 3(0,0057)
LD = X 5 µg/L = 3,48 µg/L 0,112
Lampiran H
Data pembuatan kurva kalibrasi Cr(VI)
Absorban.detik No. Konsentrasi standar Cr(VI)
(ppb) 1 2 Rata-rata Keterangan 1 2 0,124 0,177 0,151 2 4 0,334 0,433 0,383 3 6 0,457 0,420 0,438 4 8 0,605 0,617 0,611 5 10 0,803 0,820 0,811 Y= 0,0832X r = 0,9932
Data hasil percobaan prakonsentrasi Cr(VI) dari contoh kain
Absorban.detik Contoh kain 1 2 Rata-rata Konsentrasi Cr(VI) (ppb) Kadar Cr(VI) dalam kain (mg/kg kain) Poliester komersial 0,000 0,000 0,000 ttd ttd T/C komersial 0,002 -0,005 -0,002 ttd ttd Kain katun celup/kuning ( pengenceran 10 X ) 0,432 0,458 0,445 5,35 2,65
Kain katun celup/biru ( pengenceran 10 X)
SURAT PELIMPAHAN HAK CIPTA
Yang bertanda tangan di bawah ini : Nama : Tatang Wahyudi
NIM : 20504005
Menyatakan bahwa penulis tesis dengan judul : Prakonsentrasi Krom (VI) dari matriks tekstil dan penentuannya secara spektrometri serapan atom tungku karbon Dibawah bimbingan : Dr. Muhammad Bachri Amran
Adalah benar-benar tesis tersebut hasil karya tulis berdasarkan data hasil eksperimen/perhitungan/permodelan penulis selama melakukan penelitian Pasca Sarjana di Program Studi Kimia ITB.
Dengan ini penulis menyerahkan/melimpahkan Hak Cipta dari karya tulis tesis tersebut kepada Program Studi Kimia ITB.
Bandung, September 2007
Tatang Wahyudi NIM. 20504005
