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INDONESIA
Jurnal Akademika Kimia
Published by Universitas Tadulako
ISSN : 24775185     EISSN : 23026030     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Akademika Kimia merupakan jurnal elektronik open access yang bertujuan untuk mempublikasi hasil-hasil penelitian terbaru dalam area pendidikan akademik khususnya pada bidang pendidikan kimia meliputi asesment pembelajaran, model pembelajaran dan pengembangan perangkat pembelajaran, serta kimia murni termasuk kimia organik, kimia anorganik, kimia analitik, kimia fisik, biokimia dan bidang kimia lainnya seperti kimia lingkungan.
Arjuna Subject : -
Articles 8 Documents
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Search results for , issue "Vol 1, No 4 (2012)" : 8 Documents clear
ADSORPSI TIMBAL (Pb) DAN ZINK (Zn) DARI LARUTANNYA MENGGUNAKAN ARANG HAYATI (BIOCHARCOAL) KULIT PISANG KEPOK BERDASARKAN VARIASI pH (Adsorption of Plumbum (Pb) and Zinc (Zn) From Its The Solution by Using Biological Charcoal (Biocharcoal) of Kepok Banana) Darmayanti, Darmayanti; Rahman, Nurdin; Supriadi, Supriadi
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

The research has been done concerning the adsorption of biological charcoal from kapok banana peel onPb and Zn metal from solution. This study aimed to determine the ability of a banana peel charcoal to adsorbPb and Zn metal from its solution. The method used in this research was a laboratory experiment by using activated charcoal of banana peel as adsorbent ofPb and Zn metal. The absorbed Pb and Zn were measured by using Atomic Absorption Spectrometry (AAS). The results showed that the optimum pH of adsorption of Pb and Zn was obtained at pH 4 and pH 6 respectively with the concentration of Pb and Zn metal was 19.40 mg/g and 21.17 mg/g respectively.
ADSORPSI ION KADMIUM(II) DARI LARUTANNYA MENGGUNAKAN BIOMASSA AKAR DAN BATANG KANGKUNG AIR (Ipomoea aquatica Forks) (Adsorption of Cadmium(II) Ion from its Solution by Using Biomass of Roots and Stems’ Water Spinach (Ipomoea Aquatic Forsk)) Suhud, Iffatunniswah; Tiwow, Vanny M. A.; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

The research has been conducted on the adsorption of cadmium(II) ion from its solution by using biomassa roots and stems of water spinach (Ipomoea Aquatic Forsk). Theaim of the research was to determine optimum pH and concentration of cadmium(II) metal adsorbed by biomass root and stems of water spinach. The method used this study was laboratory experiments with 0.1 grams of roots and stems of water spinach powder as adsorbent and 25 mL of the cadmium(II) solution. The variation of pH was 1, 2.3, 4.5, 6.7, and 8, while the concentration was 100 ppm, 200 ppm, 300 ppm, 400 ppm, 500 ppm, 600 ppm, and 700 ppm. Determination of cadmium(II) ion adsorbed by the adsorbent has been performed using atomic adsorption spectrophotometer (AAS). The measurement showed that the optimum pH of cadmium(II) ion adsorbed by the root of water spinach was at pH 4, and by the stems was at pH 3. While the optimum concentration of metal cadmium(II) solution adsorbed by the biomass of roots and stems of water spinach was 600 ppm, the same as the adsorption powerof 91.862 mg/g for root and 91.118 mg/g for stems respectively.
DAYA INSEKTISIDA ALAMI KOMBINASI PERASAN UMBI GADUNG (Dioscorea hispida Dennst ) DAN EKSTRAK TEMBAKAU ( Nicotiana tabacum L) (The Natural Insecticide Capacity of Squeeze Combination of Cassava (Dioscoreahispida Dennst) and Tobacco’s Extract (Nicotiana t) Hasanah, Misroul; Tangkas, I Made; Sakung, Jamaluddin
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

The research regarding the natural insecticide capacity of squeeze combination of cassava (dioscoreahispida Dennst) and tobacco’s extract has been done. The purposes are to measure the capacity of squeeze combination of cassava and tobacco’s extract as a natural insecticide and to determine the most effective combination as natural insecticide. The method was the laboratory experiments by using squeeze cassava and tobacco’s extract with the comparison ratio (in mL) as follow; 0:100, 25:75, 50:50, 75 : 25, and 100 : 0. The using of various comparisons is to determine the most effective combination as natural insecticide. The data were analyzed by the statistical test analysis of variance (ANOVA) with a 95% confidence level. The result shows that the squeeze combination of cassava and tobacco’s extract reduce the capacity of natural insecticide which is dioscorin compound in cassava and nicotin in tobacco.However, the most effective treatment to kill rice pest is the mixture of cassava and tobacco 0 mL : 100 mL, and also 100 mL : 0 mL.
PENGARUH LAMA PENYIMPANAN DAN KONSENTRASI NATRIUM BENZOAT TERHADAP KADAR VITAMIN C CABAI MERAH (Capsicum annuum L) (The Effect Of Length Storage And Sodium Benzoat Concentration On The Vitamin C Levels Of Red Chili (Capsicum annuum L) Oktoviana, Yanti; Aminah, Sitti; Sakung, Jamaluddin
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

Red chillies (Capsicum annuum L) are considerable horticultural crops widely grown in Indonesia, which has a high value and demand in market. Besides it contains higher vitamin C (ascorbic acid) and beta-carotene than other fruits such as papaya, mango, pineapple and watermelon, red chillies has a very low storability as it is susceptible to decay and the over-production of chili resulting in postharvest decay. To prevent the decay, red chillies are preserved using preservatives. Preservative used in this study is sodium benzoate since it is claimed as an effective against fungi. This study aimed to determine the effect of the concentration of sodium benzoate against storage time of red chillies (Capsicum annuum L) and also to determine the effect of the concentration of sodium benzoate levels towards vitamin C in preserved red chili. The method used in this experiment was a laboratory experiment using a visible spectrophotometry. The results showed that the use of sodium benzoate as a preservative can extend the storability of red chillies and sodium benzoate concentration also affect levels of vitamin C contained in red chillies. The level obtains at the highest concentration of 1.5% which is 54 mg/100 g with 8 days of storability.
ANALISIS LOGAM TIMBAL (Pb) DAN BESI (Fe) DALAM AIR LAUT DI WILAYAH PESISIR PELABUHAN FERRY TAIPA KECAMATAN PALU UTARA (The Analysis of Lead (Pb) and Iron (Fe) Metals in The Sea Water of Coastal Area of Taipa’s Ferry Harbor Subdistrict of North Palu) Ika, Ika; Tahril, Tahril; Said, Irwan
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

The analysis of lead (Pb) and iron (Fe) have been done in Taipa’s sea water. The objective is to determine the level of lead and iron metals using spectrophtometry method. The sea water samples were taken in the morning and afternoon at three different places. The distance of 3 samples are approximately 5 m, 10 m, and 15 m from the harbour and about 5 m from the seashore. The result of the analysis level of lead and iron metals from 3 points for lead taken in the morning, point A is 0.919 mg/L, point B is 0.703 mg/L, and point C is 0.810 mg/L. While, taken in the afternoon, the lead level point A is 0.729 mg/L, point B is 0.837 mg/L, and point C is 0.729 mg/L. For the iron level taken in the morning, point A is 0.394 mg/L, point B is 0.546 mg/L, and point C is 0.324 mg/L. Meanwhile, in the afternoon the iron level, point A is 0.449 mg/L, point B is 0.365 mg/L, and point C is 0.504 mg/L. The concentration of lead metal in the sea water is in range 0.703 mg/L – 0.919 mg/L. The concentration is higher than limit ranges value of lead metal 0.025 mg/L. The concentration of iron metal in the sea water of Taipa’s harbor is about 0.324 mg/L – 0.546 mg/L. It’s concentration is higher than limit for value iron metal 0.01 mg/L.
UJI EFEKTIVITAS EKSTRAK KULIT LANGSAT (Lansium domesticum) SEBAGAI ANTI NYAMUK ELEKTRIK TERHADAP NYAMUK Aedes aegypti (A Test onthe Effectiveness of Lansium Peel Extract (Lansium Domesticum) as Mosquito Electric Repellent Against Aedes aegypti Mosquitoes) Mirnawaty, Mirnawaty; Supriadi, Supriadi; Jaya, Budiman
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

The research concerning a test on the effectiveness of lansium peel extract (lansium domesticum) as a mosquito electric repellent against AedesAegypti mosquitoes has been done. This research aimed to know the effectiveness of lansium peelextractas anelectricmosquito repellent. The method used was laboratory experiments. The lansium peel extract obtained from the maceration method added with absolute methanol was evaporated to produce thick lansium peel extract. Then, the extract was diluted to the concentration of 35, 30, 25, 20, and 15%. The research data obtained was the death of aedes aegypti which then was analyzed by statistical varian analysis test (ANOVA) with the95% confidence level. It was followed by Duncan test to determine the most effective concentration. The result showed that the most effective concentration as electrical mosquitoes repellent was 25%.
AKUMULASI LOGAM TIMBAL (Pb) DALAM IKAN BELANAK (Liza melinoptera) YANG HIDUP DI PERAIRAN MUARA POBOYA (Accumulation of Lead (Pb) Metal in Mullets (Liza melinoptera) that Live in Poboya River Estuary) Melisa Arsad; Irwan Said; Suherman Suherman
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

Poboya River estuary that known to have been contaminated with heavy metals, one of them is metal lead (Pb). This is because the high human activity in the surrounding waters hed, which may be the source of the entry of heavy metals into the estuary waters. Poboya River estuary has many kinds of marine life, including fish such as Belanak (Liza Melinoptera). Fish used as an indicator of contamination that occurred in the waters. This study aims to determine how much accumulation and metal concentrations of lead (Pb), which accumulates in fish living Belanak Poboya estuaries. The method used is the gravimetric method for determining water content, biomass and low ash content, while the analysis of the samples in this study using Atomic Absorption Spectrometry instrument (SSA). The results showed that the water content mobtained at 55.830%. While the levels of biomass were obtained for 89.200% and ash content of meat samples obtained at 10.790%. While the results showed that the accumulation of the metal lead (Pb) in Belanak fish average of 1.746 ± 1.673mg/kg. That exceeds the maximum value of the metal Lead in food in accordance with ISO 01-2729.1-2006, ie 0.4 mg/kg.
PENENTUAN KADAR KALIUM (K) DAN KALSIUM (Ca) DALAM LABU SIAM (Sechium Edule) SERTA PENGARUH TEMPAT TUMBUHNYA (Determination of Potassium (K) and Calcium (Ca) Content in Chayote (Sechium Edule) and The Effects With its Growth Soil) Cicik Fitriani, Ni Luh; Walanda, Daud K; Rahman, Nurdin
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

Chayote (sechiumeaite) is an alternative source of vegetable which is consumed largely by the community. For that reason, the research was conducted to determine the content of potassium (K) and calcium (Ca) as wll as its relation to the growth soil. The method of this research is laboratory experiments by using atomic absorption spectrometry. The result shows that the content of potassium in Palolo’s chayote meat is 134.35 mg/100 g, skin and fruit meat is 269.10 mg/100 g, and in the ground is 34.02 mg/100 g. However, in Kebun Kopi’s pumpkin, the content of potassium (K) is 177.42 mg/100 g in its fruit meat, 298.35 mg/100 g in its skin and fruit meat, and 88.02 mg/100 g in the soil. On the other hands the content of calcium obtained as follows: in Palolo’s chayote meat is 38.53 mg/100 g, in the skin and fruit meat is 55.865 mg/100 g, and in the soil is 32.72 mg/100 g. In the area of Kebun Kopi’s chayote meat is 20.535mg/100 g, in the skin and fruit meat is 30.605 mg/100 g, and in the soil is 7.682 mg/100 g. Therefore, the content of potassium and calcium obtained is higher than in the literature.

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