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Alchemy : Journal of Chemistry
Published by Universitas Islam Negeri Maulana Malik Ibrahim Malang
ISSN : 20861710     EISSN : 24606871     DOI : http://dx.doi.org/10.18860/al
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology
ALCHEMY: Journal of Chemistry (eISSN 2460-6871) is a scientific journal that focus on chemistry. This journal publishes a scientific article that cover research and review articles. Research topics for this journal such as natural science, physical chemistry, inorganic chemistry, organic chemistry, environment, biochemistry, marine, energy and other related-sciences. ALCHEMY: Journal of Chemistry also accepts article about halal products and chemistry on Islamic perspectives.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY" : 6 Documents clear
Analisis Kualitas Air Berdasarkan Parameter Fisika di Wilayah Kota Bengkulu Fades Br. Gultom; Refpo Rahman; Heriansyah Heriansyah
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.13517

Abstract

Water is a source of basic human needs. Clean water quality will affect environmental health and all activities in it. This study aimed to measure the quality of the water around beaches, rivers and swamps near settlements in Bengkulu City. The research location consisted of nine points with a radius of 0-2 km from the beach. Sampling was carried out using the stratified disproportional random sampling method with measured parameters including temperature, total dissolved solids (TDS) and water turbidity. The method used in the data analysis is the STORET scoring system. The samples were tested using TDS and turbidity meter based on the Arduino Uno ATMega 328. Results of temperature measurement showed relatively stable values in the range of 29-30°C; TDS values were 53-565 mg/L and water turbidity levels ranged from 90.8 to 1938.1 NTU. Based on the results of the analysis using the STORET scoring system, the water quality status in the study area was included in the medium polluted category (score -15) of 3 test parameters (temperature, TDS and water turbidity). Keywords: Water quality, physical parameter, STORET method, Bengkulu City Air merupakan sumber kebutuhan dasar manusia. Kualitas air yang bersih akan mempengaruhi kesehatan lingkungan dan seluruh aktivitas didalamnya. Tujuan penelitian ini adalah untuk mengukur kualitas air yang ada di sekitar pantai, sungai dan rawa dekat pemukiman di Kota Bengkulu. Lokasi penelitian terdiri dari 9 titik dengan radius 0-2 km dari pinggir pantai. Pengambilan sampel dilakukan dengan menggunakan metode stratified disproportional random sampling dengan parameter yang diukur diantaranya suhu, total dissolved solids (TDS) dan kekeruhan air. Metode yang digunakan dalam analisis data yaitu sistem penilaian STORET. Pengujian sampel dilakukan dengan TDS meter dan turbidity meter berbasis Arduino Uno ATMega 328. Hasil pengukuran suhu menunjukkan nilai yang relatif stabil dengan kisaran 29-30°C; nilai TDS antara 53-565 mg/L dan tingkat kekeruhan air pada rentang 90,8-1938,1 NTU. Berdasarkan hasil analisis menggunakan sistem penilaian STORET, status mutu air di wilayah penelitian termasuk pada kategori cemar sedang (skor -15) berdasarkan 3 parameter uji (suhu, TDS dan kekeruhan air). Kata kunci: Kualitas air, parameter fisika, metode STORET, Kota Bengkulu
Ekstraksi Minyak Atsiri dari Bunga Mawar (Rosa hybrda L.) dengan Metode Solvent Free Microwave Extraction Yuyun Yuniati; Saras Nurani Putri; Pradipta Risang Ratna Sambawa; Donny Satria Bhuana; Mahfud Mahfud
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.11511

Abstract

To date, essential oils still play an important role in various aspects of human life. Flowers are essential oil-producing plants that still need to be further explored, of which rose petals (Rosa hybrda L.) are an option for types of flowers that have the potential to produce economical essential oils. In this study, solvent-free microwave extraction (SFME) was used as an essential oil extraction method, which is considered safe because it does not use heat energy and chemical solvents which can be considered to trigger a decrease in the quality of the oil extract. The optimum microwave power in this study is 560 Watt with a yield of 0.0124%. The difference in the value of the feed intake ratio to the volume of the distiller (F/D) influences yield, where the F/D value of 0.15 g/mL gives the highest yield value of 0.0145%. The result of the Gas Chromatography Mass Spectrometry (GCMS) analysis shows rose flower essential oil extract provided a profile of 12 compounds, of which three dominant compounds are β-phenylethyl acetate, 2-isopropyl-5-methyl-9-methylene-bicyclo-1-decene, and nonadecane. Keywords: Extraction, rose flower petals, solvent-free microwave extraction (SFME), essential oils Hingga saat ini, minyak atsiri masih memegang peranan penting untuk berbagai aspek kehidupan manusia. Bunga-bungaan merupakan tanaman penghasil minyak atsiri yang masih perlu dieksplorasi lebih lanjut, yang mana mahkota bunga mawar (Rosa hybrda L.) adalah satu opsi jenis bunga yang berpotensi sebagai penghasil minyak atsiri bernilai ekonomis. Pada penelitian ini digunakan solvent-free microwave extraction (SFME) sebagai metode ekstraksi minyak atsiri yang dinilai aman karena tidak menggunakan energi panas dan bahan pelarut kimia yang dapat dianggap memicu penurunan kualitas ekstrak minyak. Daya microwave optimum pada penelitian ini adalah 560 Watt dengan perolehan yield sebesar 0,0124%. Perbedaan nilai rasio feed masuk terhadap volume distiler (F/D) memberikan pengaruh terhadap hasil rendemen, yang mana nilai F/D 0,15 g/mL memberikan nilai rendemen tertinggi sebesar 0,0145%. Hasil analisis Gas Chromatography Mass Spectrometry (GCMS) menunjukkan bahwa ekstrak minyak atsiri bunga mawar memberikan profil 12 senyawa dengan tiga senyawa dominan yaitu β-phenylethyl acetate, 2-isopropyl-5-methyl-9-methylene-bicyclo-1-decene, dan nonadecane. Kata kunci: Ekstraksi, mahkota bunga mawar, solvent-free microwave extraction
Effect of Stirring Time on Sodium Silicate Synthesis From Mount Kelud Volcanic Ash Isna Nurhidayati; Endang Tri Wahyuni; Nurul Hidayat Aprilita; Sarwendah Ratnawati Hermanto
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.12600

Abstract

This study performed the synthesis of sodium silicate from the volcanic ash of Mount Kelud with various stirring time in the sodium silicate synthesis process. Synthesis of sodium silicate was carried out using alkaline extraction at low temperature. This method is based on the solubility of silica under alkaline conditions and is proven to be more effective than the smelting method. The dissolution of silica contained in the volcanic ash of Mount Kelud was carried out using NaOH solution to form a Na2SiO3 solution. This process also studied the effect of stirring time on the amount of dissolved silica, with the stirring time of 0.5; 1; 1.5; 2; 2.5; 3 and 4 hours. The dissolved silica levels were tested using AAS. The amount of dissolved silica increased sharply with the longer length of stirring time, however for a stirring time of more than 2.5 hours, the dissolution was slow. The study revealed that the optimal result time was obtained from the stirring time of 2.5 hours with dissolved silica content of 19.82%. Keywords: volcanic ash, silica, sodium silicate, stirring time
Analisis Sidik Jari Kromatografi Lapis Tipis Tanaman Anting-Anting (Acalypha indica L.) Muhammad Teguh Laksono; Elok Kamilah Hayati
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.11613

Abstract

Anting-anting plant (Acalypha indica L.) is a plant that the community has used as raw material for herbal medicine. Anting-anting plants contain chemical compounds, so it is difficult to ensure these plants' safety and quality control. The research objective was to validate the method by knowing the stability, specificity, precision, and rigidity of the chromatographic profile of alkaloid compounds in the TLC analysis of the anting-anting extract. Extraction was carried out using ethyl acetate solvent for 20 minutes with a frequency of 42 kHz. The eluent used is cyclohexane: toluene: diethylamine (75:15:10) with Dragendorff reagent. The method of validation was acceptable according to the criteria except for the stability test of the analyte during chromatography. The instability of the analyte is indicated that not all spots form a straight diagonal line. The specificity of the method was carried out by comparing the fingerprint patterns of the leaves of the anting-anting with ekor kucing (Acalypha hibsida Farm.) and teh-tehan plants (Acalypha siamensis). The fingerprint profile showed a yellow stain (Rf = 0.39) on the leaves of the anting-anting, which did not appear in the fingerprint profiles of the two comparison samples. Keywords: anting-anting, fingerprint analysis, thin layer chromatography, method validation Anting-anting (Acalypha indica L.) merupakan tanaman yang telah dimanfaatkan masyarakat sebagai bahan baku obat herbal. Anting-anting mengandung banyak senyawa kimia sehingga sulit menjamin keamanan dan pengendalian mutu dari tanaman tersebut. Penelitian ini dilakukan untuk validasi metode dengan mengetahui kestabilan, spesifitas, presisi, dan ketegaran profil kromatografi senyawa alkaloid pada analisis KLT ekstrak anting-anting. Ekstraksi dilakukan menggunakan pelarut etil asetat selama 20 menit dengan frekuensi 42 kHz. Eluen yang digunakan adalah sikloheksana : toluena : dietilamin (75:15:10) dengan reagen Dragendorff. Validasi metode dapat diterima sesuai kriteria kecuali uji stabilitas analit selama kromatografi. Ketidakstabilan analit ditunjukkan dengan seluruh noda yang dihasilkan tidak membentuk garis diagonal yang lurus. Spesifitas pada metode dilakukan dengan membandingkan pola sidik jari daun anting-anting dengan daun ekor kucing (Acalypha hibsida Farm) dan daun teh-tehan (Acalypha siamensis). Profil sidik jari menunjukkan bahwa terdapat noda berwarna kuning kehijauan (Rf = 0,39) pada daun anting-anting yang tidak muncul pada profil sidik jari kedua sampel pembanding tersebut. Kata kunci: anting-anting, analisis sidik jari, kromatografi lapis tipis, validasi metode
Antioxidant and Cytotoxicity Activities of the Fermentation Extract of the Endophytic Fungi from the Marine Biota of Colt Coral Dede Sukandar; Nina Artanti; Ika Restu Purwanti; Tarso Rudiana; Fitriyanti Fitriyanti
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.11899

Abstract

Indonesia has the largest and most biodiverse coral reef in the world. Colt coral has not been studied and explored especially endophytic fungi associated with the coral. Endophytic fungi are highly potential for the production of antioxidant and anticancer compounds. This research aimed to study the antioxidant and cytotoxic activities of fermentation extract from endophytic fungi from colt coral. Filtrate and mycelium extracts were obtained from static and shake fermentations of isolate SKF 15. Antioxidant and cytotoxic assays were conducted by free radical scavenger 1,1-diphenyl-2-picrylhydrazyl (DPPH) and AlamarBlue methods, respectively. The result showed that FD extract provided the highest antioxidant activity with inhibition of 49.36% at 200 ppm of DPPH. Variation of fermentation time (3-21 days) demonstrated the highest activity with inhibition of 66.97% for antioxidant assay (7 days) and 81.13% for cytotoxic assay (3 days). FTIR analysis presented the existence of hydroxyl groups O-H (3452.58 cm-1), C=C groups (1668.43 cm-1); C-O hydroxyl group (1230.58 cm -1), and C-H sp3 groups (2941.44 cm-1). Based on LC-MS analysis, FD extract has a mass of m/z 305.63, [M+H]+, predicted as dihydroquercetin (C15H24O7). Keywords: Antioxidant assay, cytotoxic assay, endophytic fungi, colt coral, DPPH method, AlamarBlue method
Analisis Sidik Jari Kromatografi Lapis Tipis Tanaman Anting-Anting (Acalypha indica L.) Laksono, Muhammad Teguh; Hayati, Elok Kamilah
ALCHEMY:Journal of Chemistry Vol 9, No 2 (2021): ALCHEMY JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v9i2.11613

Abstract

Anting-anting plant (Acalypha indica L.) is a plant that the community has used as raw material for herbal medicine. Anting-anting plants contain chemical compounds, so it is difficult to ensure these plants' safety and quality control. The research objective was to validate the method by knowing the stability, specificity, precision, and rigidity of the chromatographic profile of alkaloid compounds in the TLC analysis of the anting-anting extract. Extraction was carried out using ethyl acetate solvent for 20 minutes with a frequency of 42 kHz. The eluent used is cyclohexane: toluene: diethylamine (75:15:10) with Dragendorff reagent. The method of validation was acceptable according to the criteria except for the stability test of the analyte during chromatography. The instability of the analyte is indicated that not all spots form a straight diagonal line. The specificity of the method was carried out by comparing the fingerprint patterns of the leaves of the anting-anting with ekor kucing (Acalypha hibsida Farm.) and teh-tehan plants (Acalypha siamensis). The fingerprint profile showed a yellow stain (Rf = 0.39) on the leaves of the anting-anting, which did not appear in the fingerprint profiles of the two comparison samples. Keywords: anting-anting, fingerprint analysis, thin layer chromatography, method validation Anting-anting (Acalypha indica L.) merupakan tanaman yang telah dimanfaatkan masyarakat sebagai bahan baku obat herbal. Anting-anting mengandung banyak senyawa kimia sehingga sulit menjamin keamanan dan pengendalian mutu dari tanaman tersebut. Penelitian ini dilakukan untuk validasi metode dengan mengetahui kestabilan, spesifitas, presisi, dan ketegaran profil kromatografi senyawa alkaloid pada analisis KLT ekstrak anting-anting. Ekstraksi dilakukan menggunakan pelarut etil asetat selama 20 menit dengan frekuensi 42 kHz. Eluen yang digunakan adalah sikloheksana : toluena : dietilamin (75:15:10) dengan reagen Dragendorff. Validasi metode dapat diterima sesuai kriteria kecuali uji stabilitas analit selama kromatografi. Ketidakstabilan analit ditunjukkan dengan seluruh noda yang dihasilkan tidak membentuk garis diagonal yang lurus. Spesifitas pada metode dilakukan dengan membandingkan pola sidik jari daun anting-anting dengan daun ekor kucing (Acalypha hibsida Farm) dan daun teh-tehan (Acalypha siamensis). Profil sidik jari menunjukkan bahwa terdapat noda berwarna kuning Untuk menambah keseruan bermain, indohoki77 menawarkan berbagai bonus dan promosi menarik kehijauan (Rf = 0,39) pada daun anting-anting yang tidak muncul pada profil sidik jari kedua sampel pembanding tersebut. Kata kunci: anting-anting, analisis sidik jari, kromatografi lapis tipis, validasi metode

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