76
LAMPIRAN 2 CONTOH PERHITUNGAN
2.1 PERHITUNGAN BILANGAN IODIN ADSORBEN
Bilangan Iodin
mg g
=
10-
VxN1 N2
W
2
x W
1
xFp 3.1
Dimana, V
= volume natrium tiosulfat yang diperlukan ml N
1
= normalitas natrium tiosulfat N N
2
= normalitas iodin 0,1 N W
1
= jumlah iodin untuk setiap 1 ml larutan natrium tiosulfat 0,1 N 12,69 mgml
W
2
= massa sampel g Fp
= faktor pengenceran 5
Misalnya untuk adsorben hasil modifikasi pada suhu 130
o
C dan rasio adsorben : asam nitrat bv sebesar 1:2, diketahui :
V = 6,0 ml
N
1
= 0,1001 N W
2
= 0,52 g Maka
: Bilangan Iodin
mg g
= 10-
6x 0,1001 0,1
0,52 x 12,69 x 5
= 511,773 mgg
2.2 PERHITUNGAN KADAR ASAM LEMAK BEBAS
Asam Lemak Bebas =
N x V x M gr sampel
L2.2 Ket :
N = normalitas larutan NaOH moll V = volume larutan NaOH terpakai ml
M = berat molekul FFA grmol = 25,6 sebagai asam palmitat [57].
Universitas Sumatera Utara
77 Misalnya perhitungan untuk kadar asam lemak bebas minyak kelapa sawit
yang diadsorpsi pada waktu 35 menit dengan dosis adsorben 1 diketahui: N = 0,1 N
V = 7,8 ml M = 25,6 grammol asam palmitat
Berat sampel = 5,09 gram Maka,
Asam Lemak Bebas =
0,1 x 7,8 x 25,6 5,09
3.3 = 3,923
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78
LAMPIRAN 3 FOTO HASIL PENELITIAN
3.1 FOTO PERCOBAAN PEMBUATAN ADSORBEN BIJI ASAM JAWA
Gambar 3.1 Sampel Biji Asam Jawa
Gambar 3.2 Sampel Biji Asam Jawa Dihaluskan dengan Blender Kering
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79 Gambar 3.3 Sampel Diayak dengan Ayakan 140 mesh
Gambar 3.4 Sampel yang Lolos Ayakan 140 mesh
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80 Gambar 3.5 Sampel Biji Asam Jawa Diaktivasi dengan Asam Nitrat HNO
3
4 N sambil Dipanaskan
Gambar 3.6 Adsorben Dicuci dan Disaring
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81 Gambar 3.7 Tempat Pengeringan Adsorben yang Telah Dicuci dan Disaring
Gambar 3.8 Adsorben Hasil Pengeringan di Dalam Oven
3.2 FOTO ANALISA BILANGAN IODIN ADSORBEN
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82 Gambar 3.9 Adsorben Dikeringkan di Dalam Oven
Gambar 3.10 Adsorben Dicampur dengan Larutan Iodin dan Dikocok
Gambar 3.11 Campuran Disaring untuk Diambil Filtratnya
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83 Gambar 3.12 Hasil Titrasi Filtrat dengan Natrium Tiosulfat Na
2
S
2
O
3
0,1 N
Gambar 3.13 Hasil Titrasi Filtrat Setelah Penambahan Amilum
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84
3.3 FOTO PERCOBAAN ADSORPSI KADAR ASAM LEMAK BEBAS DAN BILANGAN PEROKSIDA PADA MINYAK KELAPA SAWIT
Gambar 3.14 Rangkaian Alat Percobaan Utama
Gambar 3.15 Minyak Hasil Reaksi Disaring Menggunakan Pompa Vakum
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85 Gambar 3.16 Adsorben Sisa Reaksi atau Spent Adsorbent
Gambar 3.17 Minyak Hasil Reaksi
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86 Gambar 3.18 Rangakaian Peralatan Analisa Kadar Asam Lemak Bebas
Gambar 3.19 Hasil Titrasi Analisa Kadar Asam Lemak Bebas
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87 Gambar 3.20 Adsorben dengan Bilangan Iodin Tertinggi kiri Adsorben dengan
Hasil Adsorpsi Terbaik kanan
Gambar 3.21 Minyak Hasil Adsorpsi Terbaik
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61
DAFTAR PUSTAKA
[1] Departemen Perindustrian, Roadmap Industri Pengolahan CPO, Direktorat
Jenderal Industri Agro Dan Kimia Departemen Perindustrian, 2009.
[2] J. Erna, Produksi CPO AALI 2013 Tumbuh 4,2, Diakses 15 Januari 2014,
dari SindoNews. http:ekbis.sindonews.comread82670032produksi-cpo-aali-2013-tumbuh-4-2
[3] C.W. Puah, Y. M. Choo, A. N. Ma, C. Chuah,
“Deguming and Bleaching: Effect on Selected Constituents of Palm Oil
”, Journal of Oil Palm Research, Vol., 16, No.2, 2004 : hal. 57
– 63.
[4] S. H. Goh, Y. M. Choo, S. H. Ong,
“Mineral Constituents of Palm Oils”, J. Am. Oil Chem. Soc., Vol. 62, 1985 : hal. 237
– 240.
[5] Noor Azian Morad, Mustafa Kamal Abd Aziz, Rohani binti Mohd Zin,
“Process Design in Degumming and Bleaching of Palm Oil”, Research, Centre of Lipids Engineering and Applied Research CLEAR, Universiti Teknologi
Malaysia, Vote No. 74198, 2006.
[6] F. M. Ogwu, M. Odo, O. Osborne,
“The Quality of Locally Processed Palm Oil from Ebonyi and Enugu States
”, Proceedings of the 26th Annual NIFST Conference, 4th-8th November 2012, hal. 47
– 48.
[7] S. Lin, C. C. Akoh, A. E. Reynolds,
“The Recovery of Used Frying Oil with Various Adsorbent
”, Journal Food Lipids, Vol. 5, 1998 : hal. 1 – 16.
[8] Deny Sumarna, “Keuntungan Proses Wet Degumming Dibanding Dry
Degumming pada Pemurnian Minyak Sawit Kasar”, Jurnal Teknologi Pertanian,
21 2007 : hal. 37 – 42.
Universitas Sumatera Utara
62 [9]
Wei Puah Chiew, Choo Yuen May, Ma Ah Ngan, Chuah Cheng Hock, “Degumming and Bleaching: Effect on Selected Constituents of Palm Oil”,
Journal of Oil Palm Research, 162 2004 : hal. 57 – 63.
[10] Fereidoon Shahidi, Bailey’s Industrial Oil and Fat Products, Sixth Edition,
Volome 2 Edible Oil and Fat Products : Edible Oils, New Jersey : John Wiley Sons, Inc., 2005, hal. 372.
[11] Deny Sumarna, “Kajian Proses Degumming CPO Crude Palm Oil dengan
Menggunakan Membran Ultrafiltrasi ”, Sekolah Pasca Sarjana, Institut Pertanian
Bogor, Bogor, 2006.
[12] O. Idoko, Bwai M. D, Emmanuel S. A, Thomas S. A, “Effect of Bleaching
and Degumming on The Physicochemical Properties and Antioxidant Activity of Palm Oil
”, Research Journal in Engineering and Applied Sciences, 25 2013 :
hal. 343 – 345.
[13] D. Cowan, H. C. Holm, H. S. Yee, “Reduction in Free Fatty Acid in Crude
Palm Oil by Enzymatic Remediation”, Journal of Oil Palm Research, Vol. 24, 2012.
[14] Ramdani Ritonga, “Penentuan Bilangan Peroksida pada Minyak Inti Kelapa
Sawit CPKO di PT. Ecogreen Oleochemicals”, Karya Ilmiah, Universitas Sumatera Utara, 2010.
[15] Audy D. Wuntu, Vanda S. Kamu., “Adsorpsi Aseton pada Arang Aktif Biji
Asam Jawa”, Jurnal Ilmiah Sains, 112 2012 : hal. 174 – 177.
[16] Wai Lin Siew, Cheah Kien Yoo, “Adsorption Isotherms for Removal of
iron, Copper, Phosphorous and Oxidation Products from Crude Palm Oil Using Natural and Acid-
Activated Clays”, Journal of Oil Palm Research, Vol. 19, 2007 : hal. 356
– 363.
Universitas Sumatera Utara
63 [17] Bernard
Enrico, ”Pemanfaatan Biji Asam Jawa Tamarindus indica sebagai Koagulan Alternatif dalam Proses Penjernihan Limbah Cair Industri Tahu
”, Tesis, Sekolah Pascasarjana Universitas Sumatera Utara, Medan, 2008.
[18] Enggar Pawening , ”Pemanfaatan Arang Aktif dari Biji Buah Asam Jawa
Tamarindus indica sebagai Adsorben Logam Berat Kromium III ”, Program
Studi Kimia Fakultas Sains dan Teknologi Universitas Airlangga, Surabaya, 2009
[19] Kumar, P. Senthil, R. Sivaranjanee, U. Vinothini, M. Raghavi, K. Rajasekar, K. Ramakrishnan, “Adsorption of Dye onto Raw and Surface Modified Tamarind
Seeds: Isotherms, Process Design, Kinetics, and Mechanism”, Balaban
Desalination Publications, 1944-39941944-3986, 2013.
[20] Suresh Gupta, B. V. Babu, “Adsorption of Chromium VI by a Low-Cost
Adsorbent Prepared from Tamarind Seeds ”, Rajasthan: Chemical Engineering
Group, Birla Institute of Technology and Science, 2007.
[21] K. Munusamy, Rajesh S. Somani, Hari C. Bajaj, “Tamarind Seeds Carbon :
Preparation and Methane Uptake”, Bioresources Peer Reviewed Article. 61 2011 : hal. 537
– 551.
[22] S. Shanti, T. Mahalakshmi, “Studies on the Removal of Malachite Green
and Methylene Blue Dyes from Aqueous Solutions of Their Binary Mixyure by Adsorption Over Commercial Activated Carbon and Tamarind Kernel Powder”,
International Journal of Research in Pharmacy and Chemistry, ISSN: 2231-2781, 22 2012 : hal. 289
– 298.
[23] Thomas Binitha Mancy, Meby Mary Matthew, Shaleesha A. Stanley. “Comparative Analysis of Cost Effective Biosorbents in the Removal of
Chromium and Iron from Aqueous Solution”. Advanced Bio Tech Article. Vol. 12,
2013
Universitas Sumatera Utara
64 [24]
R. Rajeshkannan, M. Rajasimman, N. Rajamohan, “Decolourization of Malachite Green Using Tamarind Seed: Optimazation, Isotherm, and Kinetic
Studies”, Chemical Industry Chemical Engineering Quarterly, 171 2011 : hal. 67
– 79.
[25] R. Gayathri, M. Thirumarimurugan, T. Kannadasan, “Removal of
Chromium VI ions from Aqueous Solutionusing Tamarind Seeds as an Adsorbent
”, International Journal of Pharmaceutical and Chemical Sciences, 22 2013.
[26] Abdullah, Yudhistira Abdi Atmanegara, Radna Nurmasari, “Optimasi
Pemucatan CPO Menggunakan Arang Aktif dan Bentonit”, Jurnal Ilmu Dasar, 112 2010 : hal. 124
– 128.
[27] Siti Aisyah, Eny Yulianti, Ghanaim Fasya, “Penurunan Angka Peroksida
dan Asam Lemak Bebas FFA pada Proses Bleaching Minyak Goreng Bekas oleh Karbon Aktif Polong Buah Kelor Moringa Oliefera. Lamk dengan Aktivasi
NaCl”, ALCHEMY, 12 2010 : hal. 93 – 103.
[28] R. Wannahari, M. F. N. Nordin, “Reduction of Peroxide Value in Used
Palm Cooking Oil Using Bagasse Adsorbent”, American International Journal of Contemporary Research, 21 2012 : hal. 185
– 191.
[29] Widayat, Suherman , dan K. Haryani., “Optimasi Proses Adsorbsi Minyak
Goreng Bekas dengan Adsorbent Zeolit Alam: Studi Pengurangan Bilangan Asam”, Jurnal Penelitian Teknik Kimia, 171 2006.
[30] Ailen Tanjaya, Sudono, Nani Indraswati, Suryadi Ismadji, “Pembuatan
Bleaching Earth dari Bentonit Pacitan dengan Aktivasi Asam : Karakterisasi dan Kemampuan Bleaching
”, Jurnal Teknik Kimia Indonesia, 52 2006 : hal. 429 – 434.
Universitas Sumatera Utara
65 [31] J. C. Igwe, A. A. Abia,
“A Bioseparation Process for Removing Heavy Metals from Waste Water Using Biosorbents
”, African Journal of Biotechnology, 512 2006 : hal. 1167-1179.
[32] M. A. Ashraf, M. J. Maah, I. Yusoff, “Study of Banana Peel Musa
sapientum as a Cationic Biosorben ”, American-Eurasian J. Agric Environ. Sci,
81 2010 : hal. 7 – 17.
[33] T. Tsuda, Watanabe, K. Oshima, A. Yamamoto, S. Kawakishi, T. Osawa, “Antioxidative Componen Isolated from The Seed of Tamarind Tamarindus
indica L. ”, Agricultural Food Chemical, 1994.
[34] K. El-Siddig, H.P.M. Gunasena, B.A. Prasad, D.K.N.G. Pushpakumara, K.V.R. Ramana, K.V.R. Ramana, P.Vijayanand, J. T. Williams., Tamarid
Tamarindicus indica L., Southampton: Southampton Centre for Underutilised Crops, 2006.
[35] H. D. Gunasena, A. Hughes, Tamarind : Tamarindus indica, Southampton: International Centre for Underutilised Crops, 2000.
[36] M. M. Morad, S. B. El Magoli , K. A. Sedky, “Physico-Chemical Properties
of Egyptian Tamarind Seed Oil ”, Fette Seifen Anstrichmittel, Vol. 80, 1978 : hal.
357 – 359.
[37] M. M. Ishola, E. B. Agbaji, A. S. Agbaji, “A Chemical Study of
Tamarindus indica Tsamiya Fruits Grown in Nigeria ”, Journal of Science, Food
and Agriculture, Vol. 51, 1990 : hal. 141 – 143.
[38] P. K. Bhattacharya, S. Bal, R. K. Mukherji, “Studies on The Characteristics
of Some Products from Tamarind Tamarindus indica L. Kernels ”, Journal of
Food Science and Technology India, 315 1994 : hal. 372 – 376.
Universitas Sumatera Utara
66 [39]
Nilanjana Rao 2005, “Use of Plant Material as Natural Coagulants for Treatment of Watewater”, Diakses 1 Maret 2014 dari Visionriviewpoint
http:www.visionriviewpoint.comarticle.asp?articleid=48
[40] E. S. Imbabi, K. E. Ibrahim, I. M. Abulfutah, P. Hulbert, “Chemical
Characterization of Tamarind Bitter Principle ”, Fitoterapia, 636 1992 : hal. 537
– 538.
[41] A. Mishra, M. Bajpai , “Flocculation Behaviour of Model Textile
Wastewater Treated with Food Grade Polysaccharide ”, Journal Hazard, Mat,
B118, 2005 : hal. 213 – 217.
[42] T. Khrisna Murthy, Minor Forest Products of India New Delhi: Oxford and IBH, 1993, hal. 234
– 335.
[43] G. Vazquez, G. Antorrena, J Gonzalez, M. D. Doval. “Bioresource
Technol ”, 1994 : hal. 251 – 255.
[44] Puspita, Yohanna Vinia Dewi, Mohammad Shodiq Ibnu, Surjani Wonorahardjo,
“Karakterisasi dan Uji Kemampuan Serbuk Ampas Kelapa Asetat sebagai Adsorben Belerang Dioksida SO
2
”, Jurusan Kimia, FMIPA, Universitas Negeri Malang, Malang, 2013.
[45] M. Bockish, Fats and Oils Handbook, USA: AOCS Press, 1998
[46] Frank D. Gunstone, The Chemistry of Oils and Fats, UK: Blackwel Publishing Ltd., 2004.
[47] Oybek Zufarov, Štefan Schmidt, Stanislav Sekretár, “Degumming of
Rapeseed and Sunflower Oils”, Acta Chimica Slovaca, 11 2008 : hal. 321 – 328.
Universitas Sumatera Utara
67 [48]
Abdul A. Azis, “The Effect of CPO Quality Parameters FFA, MI, IV, PV, AV , DOBI and
Colour on the Refinery Production Efficiency”, Proceedings of the 2000 National Seminar on Palm Oil Milling, Refining Technology, Quality
and Environment, 2000 : hal. 79 – 88.
[49] S. Ketaren, Minyak dan Lemak Pangan, Jakarta: Universitas Indonesia Press, 2005.
[50] B. Jacobsberg, “Palm Oil Characteristics and Quality”, Proceedings of First
MARDI Workshop on Oil Palm Technology, Kuala Lumpur, 1974.
[51] M. W. Formo, E. Jungermann, F. A. Norris, N. O. Sonntag, Bailey’s
Industrial Oil and Fat Products, New York: John Wiley Sons Inc., 1979.
[52] R. Sambanthamurthi, K. Sundram, Y. A. Tan, “Chemistry and Biochemistry
of Palm Oil”, Progress in Lipid Research, Vol. 39, 2000 : hal. 507 – 558.
[53] W. L. Leong, “The Refining and Fractionation of Palm Oil”, Palm Oil Mill
Engineers-Executives Training Course 14th Semester 1, PORIM, 1992.
[54] G. Borner, J. Hollien, M. Schneider, “Practical Experiences with
Countercurrent Bleaching Process”, Proceedings of the 1999 PORIM International Palm Oil Congress Chemistry and Technology, 1999 : hal. 52
– 59.
[55] M. S. A. Yusoff, T. Thiagarajan, “Refining and Downstreaming Processing
of Palm and Palm Kernel Oil”, Selected Readings on Palm Oil and Its Uses, 1993 : hal. 150
– 174.
[56] D. Copeland, B. W. Maurice, “Vegetable Oil Refining”, U.S. Patent
6844458, 2005.
Universitas Sumatera Utara
68 [57]
Badan Standardisasi Nasional, “Minyak Kelapa Sawit Mentah Crude Palm Oil
”, SNI 01-2901-2006, 2006.
[58] Badan Standardisasi Nasional, “Minyak Goreng Sawit”, SNI 7709:2012,
2012.
[59] K. L. Er, “Quality Control Laboratories in Refineries”, Proceedings of
Workshop on Quality in the Palm Oil Industry, Agustus, 1985 hal. 203 – 208.
[60] Djoehana, Budidaya Kelapa Sawit, Ungaran: Kanisius, Ungaran, 1992.
[61] A. J. Dijkstra, M. V. Opstal, “Process for Producing Degummed Vegetable
Oils and Gums of High Phospholipidic Acid Content, U.S. Patent 4.698.185, 1987.
[62] T. Thiagarajan, T. S. Tang, “Refinery Practices and Oil Quality”, PORIM
International Palm Oil Conference Chemistry and Technology, Vol 1, 1991 : hal. 254
– 266.
[63] Dece Elisabeth Sahertian, Haryono Semangun, “Pemucatan Warna
Bleaching pada Minyak Sawit Mentah”, Mikoriza: Bios-Majalah Ilmiah
Semipopuler, 52 2011 : hal. 41 – 43.
[64] Emma Zaidar Nasution, “Manfaat dari Beberapa Jenis Bleaching Earth
Terhadap Warna CPO Crude Palm Oil”, Jurnal Sains Kimia, 72 2003 : hal. 31 – 35.
[65] Nurhida Pasaribu , “Minyak Buah Kelapa Sawit”, Jurusan Kimia, Fakultas
Matematika dan Ilmu Pengetahuan Alam, Universitas Sumatera Utara, Medan, 2004.
Universitas Sumatera Utara
69 [66] David W. Martin, Biokimia, Jakarta: EGC Penerbit Buku Kedokteran,
1992.
[67] H. W. Lawson, Standard For Fat and Oil, Volume 5, United State America: Avi Publishing Company, Inc. Connenticut, 1985.
[68] Lahuddin Rangkuti, “Analisa Kadar Asam Lemak Bebas ALB, Kadar Air,
dan Kadar Kotoran pada Minyak Kelapa Sawit CPO Hasil Olahan PT. Mopoli Raya Aceh Tamiang”, Karya Ilmiah, Universitas Sumatera Utara, Medan, 2007.
[69] J. Weiss Theodore, Food Oils and Their Uses, Second Edition, United State America: The AVI Publishing Company, 1983.
[70] S. Ketaren, Pengantar Teknologi Minyak dan Lemak Pangan, Edisi I, Jakarta: UI-Press, 1986.
[71] S. Sudarmadji, Analisa Bahan Makanan dan Pertanian, Yogyakarta: Liberty Yogyakarta Bekerja Sama dengan Pusat Antara Universitas Pangan dan
Gizi Universitas Gadjah Mada, 1989.
[72] H. Egan, Ronald S. Kirk, R. Sawyer, Pearson’s Chemical Analysis of
Foods, Eighth Edition, New York: Churchill Livingstone, 1981.
[73] M. Suguna, N. Siva Kumar, M. Venkata Subbaiah, A. Krishnaiah, “Removal of Diavalent Manganese from Aqueous Solution Using Tamarindus
indica Fruit Nut Shell”, J. Chem. Pharm. Res., 21 2010 : hal. 7 – 20.
[74] Yustinah, Hartini “Adsorbsi Minyak Goreng Bekas Menggunakan Arang
Aktif dari Sabut Kelapa”, Prosiding Seminar Nasional Teknik Kimia “Kejuangan” Pengembangan Teknologi Kimia untuk Pengolahan Sumber Daya Alam
Indonesia. ISSN 1693 – 4393, 2011
Universitas Sumatera Utara
70 [75] Julius Fernando Pakpahan, Tomas Tambunan, Agnes Harimby, M. Yusuf
Ritonga., “Pengurangan FFA dan Warna dari Minyak Jelantah dengan Adsorben Serabut Kelapa dan Jerami”, Jurnal Teknik Kimia USU, 21 2013 : hal. 31 – 36.
[76] AOCS, Official Methods and Recommended Practices of the AOCS, 4th Edition, USA: American Oil Chemists Society, Champaign, 1993.
[77] ASTM D 4607-94, Standard Test Method for Determination of Iodine Number of Activated Carbon, Philadelphia: Annual Book of ASTM Standard,
1999, hal. 15.
[78] Sandra Hermanto, Anna Muawanah, dan Rizkina Harahap, “Profil dan
Karakteristik Lemak Hewani Ayam, Sapi dan Babi Hasil Analisa FTIR dan GCMS
”, Program Studi Kimia, Fakultas Sains dan Teknologi Universitas Islam Negeri Syarif Hidayatullah, Jakarta, 2013
[79] Mohammad Abedi, Zaker Bahreini, “Preparation of Carbonaceous
Adsorbent from plant of Calotropis Gigantea by Thermo-Chemical Activation Process and its Adsorption Behavior for Removal of Methylene Blue”, World
Applied Sciences Journal, 113 2010 : hal. 263 – 268.
[80] H. Xin, J. Liu, F. Fan, Z. Feng, G. Jia, Q. Yang, C. Li. “Mesoporous
Ferrosilicates with High Content of Isolated Iron Species Synthesized in Mild Buffer Solution and Their Catalytic Application. Microporous and Mesoporous
Materials, Vol. 113 2008 : hal. 231 – 239.
[81] W. M. Johnson, J. A. Maxwell, Rock and Mineral Analysis. Edisi Kedua, New York: John Wiley Sons Inc., 1981.
[82] B. Louise, “Adsorption of Chromium VI by a Low-Cost Adsorbent,
Chemosphere, 301 2002 : hal. 561 – 578.
Universitas Sumatera Utara
71 [83] L. G. Hargis, Analytical Chemistry, New Jersey: Printice Hall, 1988.
[84] D. A. Skoog, F. J. Holler, T. A. Nieman, Principles of Instrumental Analysis, Edisi ke 5, Orlando: Hourcourt Brace, 1998.
[85] Harry Budiman, Fransiska Sri H.K, Achmad H Setiawan, “Preparation of
Silica Modified 2-Mercaptoimidazole and its Sorption Properties of Chromium III”, E-Journal of Chemistry, 61 2009 : hal. 141 – 150.
[86] Ralph T. Yang, Adsorbents: Fundamentals and Applications, New Jersey: John Wiley Sons Inc, 2003, hal. 92.
[87] Kurnia Handayani, Yusnimar, “Pengaruh Ukuran Partikel Bentonit dan
Suhu Adsorpsi Terhadap Daya Jerap Bentonit dan Aplikasinya pada Bleaching CPO”, Jurnal Teknobiologi, ISSN: 2087 – 5428, 42 2013 : hal. 117 – 121.
Universitas Sumatera Utara
35
BAB III METODOLOGI PENELITIAN
3.1 LOKASI DAN WAKTU PENELITIAN
Kategori