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ALKIMIA : Jurnal Ilmu Kimia dan Terapan
Published by Universitas Islam Negeri Raden Fatah Palembang
ISSN : 25809873     EISSN : 25809881     DOI : -
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Social Sciences
ALKIMIA : Journals of chemistry and applied science with number of E-ISSN: 2580-9881 and P-ISSN: 2580-9873 is a journal of chemistry that publishes research results related to the findings in the field of organic chemistry, inorganic, physical, analytical, biochemical and other as a problem solving in the field of environment, energy, and food. ALKIMIA is published twice a year in February and August, by chemistry science and technology faculty of UIN Raden Fatah Palembang. The editors are happy to invite researchers to publish their research results at Journal ALKIMIA.
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Articles 87 Documents
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Influence of Solvent Polarity on Color Intensity of Marigold Flower Extracts Retnowati, Rurini; Sulistyarti, Hermin; Suratmo; Ulfa, Siti Mariyah; Kamulyan, Budi; Destiara, Irena Amelia; Muzdhalifa, Sefira Putri; Ananda, Regina Ridha
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/gfzt5f62

Abstract

In this paper, we report research on the extraction of natural dyes from yellow and orange marigold (Tagetes erecta L.) petals using different solvents. This research aims to determine the optimal dye removal process, investigate stability, and establish color intensity profiles. In order to extract natural dyes that produced various shades of the dried powder of yellow and orange marigold flower petals, two solvents with different polarities, n-hexane and ethyl acetate were used. The maceration procedure using different solvent types was carried out separately. The stability study revealed that all the dyes at room temperature showed better stability with minor changes observed by UV-Visible (UV-Vis) spectrum profiles, indicating that the extracts were stable until the 30th day. To ascertain the color intensity profiles, analytical tests such as UV-Vis spectroscopy and colorimetry utilizing a color reader device were carried out. The color intensity profile of the yellow and orange marigold flower extracts resulting from the UV-Vis spectrum analysis showed that the absorption of the ethyl acetate extract is higher. The pigment concentration, which is also expressed by absorbance, is connected to variations in color intensity. Additionally, the color intensity profile characterization using a color reader revealed that the n-hexane and ethyl acetate extracts had different Commission Internationale d'Eclairage (CIE) L*, a*, and b* values. The yield and color intensity of the extracts were affected by the solvent polarity. In conclusion, the study of the extract's color intensity profile using UV-Vis spectroscopy and a color reader shows that the intensity parameters are aligned.
ntesis Perekat Kayu Lignin–Urea Formaldehida (LUF) Berbasis Lignin yang Diekstraksi dari Tandan Kosong Kelapa Sawit (TKKS Dian Wardana; Eddiyanto; Nurfajriani; Dwi Sapri Ramadhan; Wulan Dwi Safitri; Jam'an Fahmi
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ccj7gm39

Abstract

Oil palm empty fruit bunches are one of the underutilized plantation wastes. Lignin is one of the components of plant cell walls besides cellulose and hemicellulose that can be used as a raw material for the synthesis of lignin-based adhesives, namely lignin-urea-formaldehyde (LUF) adhesive resins. The polymerization reaction of LUF formation was confirmed from the shift and change in the FTIR wavenumber of the -CO-ether group of LUF compared to UF and LF obtained during the synthesis process. The tensile strength test results of all adhesives produced exceeded the tensile strength value of commercial UF adhesives, and it was found that increasing the lignin concentration in the synthesized adhesives was directly proportional to the tensile strength value. Increasing the lignin concentration was also able to reduce formaldehyde emissions from all variations of adhesives produced, but was unable to exceed the lower formaldehyde emission value of UF adhesives.
PRODUKSI BIOETANOL DARI LIMBAH KULIT NANAS DENGAN PROSES FERMENTASI MENGGUNAKAN MIKROORGANISME SACCHAROMYCES CEREVISIAE DALAM FERMENTOR TIPE BATCH Nur Alifah, Desy; Oktofarizi, Irgy Rahmat; Septiana, Iriani Reka; Febriana, Ida; Yunanto, Isnandar
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/4tywp834

Abstract

Bioenergy is an energy resource produced through the processing of biomass formed through photosynthetic processes. One form of bioenergy is bioethanol. Bioethanol is ethanol created from the breakdown of sugars through a simple fermentation process with the role of yeast (Saccharomyces cerevisiae). One of the basic materials that can be utilized in bioethanol production is pineapple residue (Ananas comosus L. Merr). Its high carbohydrate and reducing sugar content makes it a prospective source for producing ethanol. The fermentation stage is an essential process in bioethanol production, namely the decomposition of carbohydrates into ethanol and CO₂ gas, which is then followed by a purification stage through evaporation and distillation processes. This research focuses on the processing of bioethanol derived from pineapple peel waste by varying the quantity of yeast (Saccharomyces cerevisiae) and varying the fermentation time on the resulting ethanol concentration. Based on the trial findings, the maximum ethanol concentration formed reached 80%. The highest yield was 10.2%, with an ethanol pH of 7, a water content of 0.793%, a density of 0.7397 g/ml, and a viscosity of 1.1432 cP.
Optimization of phosphoric acid activation on palm shell activated carbon for bio-battery Trisnaliani, Lety; Ida Febriana; Safril Kartika Wardana; Tri Larasati; Berlian Tiaraa; Adha Triwibowo; Arief Fauzana; Lirantika
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/vxrt5e83

Abstract

The increasing global energy crisis and environmental issues arising from conventional battery waste have stimulated the exploration of sustainable and eco-friendly energy storage systems such as bio-batteries. This research investigated the influence of phosphoric acid (H3PO4) concentration on the characteristics of activated carbon produced from palm shell biomass and its performance in a bio-battery system. Palm shells were carbonized at 500oC and chemically activated using H3PO4 solutions with concentrations of 1 M, 1.5 M, 2 M, 2.5 M and 3 M in a mass-to-volume ratio of 1:2. The resulting activated carbon was employed as a solid-static electrolyte in a bio-battery with aluminum as the anode and copper as the cathode. The battery performance was evaluated under a constant load using a 2-volt LED, measuring voltage, current, power output and capacity. The results indicated that increasing the H3PO4 concentration improved the iodine adsorption capacity, surface porosity (based on SEM analysis), and electrochemical behavior of the bio-battery. The optimum results were achieved at 3 M H3PO4, producing an iodine adsorptiion capacity of 888.3 mg/g, a maximum voltage of 3.66 V, and a power output of 9.835 mW. It was concluded that 3 M H3PO4 yielded activated carbon with optimal physicochemical properties for bio-battery applications, supporting the development of renewable and environmentally friendly energy technologies. 
Eyebrow Cream Preparation Formulation Based on Activated Carbon from Elaeis guineensis Jacq. Shells Annisaa Siti Zulaicha; Deviana Safitri; Iwan Syahjoko Saputra; Wahyu Solafide Sipahutar; Yunita Fahni
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/7p42db04

Abstract

This study aims to utilize palm kernel shell waste as a source of activated carbon for the formulation of safe and sustainable eyebrow cream. Activated carbon was obtained through pyrolysis and physical activation at 800°C, then characterized using proximate analysis, SEM-EDX, XRD, and FTIR to determine its structure, composition, and purity. The characterization results showed that the activated carbon had 100% carbon purity, a porous amorphous structure, and a predominance of C=C groups, indicating a non-polar surface with high adsorptive potential. The activated carbon was then formulated into four variations of eyebrow cream using the hot emulsification method and evaluated through organoleptic, homogeneity, pH, and smudge resistance tests. All formulas showed physical stability for four weeks, a semi-solid texture, homogeneity without granules, and increased color with increasing activated carbon concentration. The pH value of all formulas was 5, within the safe range for skin. This study shows that palm kernel shell activated carbon not only meets the characteristics of stable and safe cosmetic pigments but also provides a natural coloring alternative that supports the concepts of clean beauty, green cosmetics, and the circular economy. Thus, palm kernel shell waste activated carbon has great potential to be developed as an active ingredient in decorative cosmetics, particularly natural-based eyebrow creams.
Determination of Nitrite Levels in Boiled White and Purple Cabbage Based on Boiling Time Variations Eka Fitri Yanti; Nur Nadia Faridha; Bannan Muthi'tul Af'idah; Istiqomah; Mohammad Rofik Usman
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/57vkzs84

Abstract

Cabbage is a type of vegetable that contains various vitamins such as vitamins A, C, and K. One of the chemical components found in cabbage is nitrite (NO₂). Nitrite is a nutrient formed naturally with concentrations depending on species variation, season, light, and fertilizer use. This study aims to determine the nitrite levels in boiled purple and white cabbage with varying boiling times using the UV-Vis spectrophotometric method. Additionally, this research evaluates whether the nitrite content in the boiled cabbage remains within the Acceptable Daily Intake (ADI). The extraction was carried out using distilled water with boiling time variations of 0, 5, 10, 15, and 20 minutes. Nitrite levels were determined using the UV-Vis spectrophotometric method. The nitrite content found in white cabbage for boiling durations of 0, 5, 10, 15, and 20 minutes were 1.672 ppm, 0.986 ppm, 1.037 ppm, 0.951 ppm, and 0.999 ppm, respectively. For purple cabbage, the levels were 1.627 ppm, <0.5 ppm, 0.624 ppm, 0.775 ppm, and <0.5 ppm, respectively. The nitrite contents in both white and purple cabbage were found to be safe according to the ADI value of 4.2 mg/kg for a person weighing 60 kg.
Analysis Relationship between Free Fatty Acid and Peroxide Values in Crude Palm Oil Industry Ramlan Silaban; Marta Adeliana Sijabat; Afrilita Harahap; Timotius Agung Soripada; Marham Sitorus; Eddiyanto; Ahmad Nasir Pulungan
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/x133fg91

Abstract

Crude Palm Oil (CPO) is crude palm oil extracted from the palm oil industry that has not undergone a refining process. CPO quality is considered good if it meets applicable quality standards. This study aims to determine a mathematical equation model that describes the relationship between free fatty acid value (FFA) quality parameters and peroxide value (PV) in CPO samples. FFA content analysis was carried out using the alkalimetric titration method, while the peroxide value was tested using the iodometric titration method. The storage time variations used were 0 - 3 weeks. The results showed that : (1). The sample consist Free Fatty Acid value (FFAV)  were 2.97%; 3.22%; 3.41%; and 3.66%, respectively, with an average of 3.31%. Meanwhile, Peroxyde Value (PV)  ​​were obtained at 1.85; 2.25; 2.65; and 3.04 meq O₂/kg. (2). According to these results, the FFAV content still meets the Indonesian National Standard (SNI) standard (<5.0%) and the PV value is also below the SNI limit (<10 meq O₂/kg). (3). The mathematicals model of relationship between FFAV shows a significant effect with a linear regression equation of Y = 0.436x + 0.0221 and a determination value (R²) of 0.0976. (4). This model indicates that an increase in FFA levels is directly proportional to an increase in peroxide value. The mathematical model obtained illustrates that an increase in PV is in line with an increase in FFA levels, both of which play an important role in determining the quality stability and storage durability of CPO.

Page 9 of 9 | Total Record : 87

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