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Salmahaminati
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INDONESIA
IJCR (Indonesian Journal of Chemical Research)
Published by Universitas Islam Indonesia
ISSN : 23549610     EISSN : 26145081     DOI : 10.20885
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
IJCR is intended to be the journal for publishing articles reporting the results of research on Chemistry field with related topics, as well as with their development through interdisciplinary and multidisciplinary approach. The types of articles published in this journal include research articles, review articles and short communication. This journal covers some topics include: Inorganic Chemistry Physical Chemistry Computational Chemistry Biochemistry Analytical Chemistry Organic Chemistry Food and Medicinal Chemistry Environmental Chemistry Material Chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 114 Documents
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Penentuan Kadar Karbon Organik pada Sampel Tanah Menggunakan Metode Walkley & Black Khusnah, Asma’ul; Pawestri, Niken; Utami, Maisari
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 10 No. 2 (2025): Volume 10, ISSUE 2, 2025
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol10.iss2.art2

Abstract

Determination of C-organic content in soil using the Walkley & Black method with a UV-Vis spectrophotometer was conducted at the Agricultural Instrument Standards Application Center in Yogyakarta. The samples used in this experiment were soil samples. The analysis method used was the Walkley & Black method with a UV-Vis spectrophotometer. This method works based on the principle of wet oxidation using potassium dichromate (K₂Cr₂O₇) and sulfuric acid (H₂SO₄), where the remaining unreacted dichromate ions are measured using a spectrophotometer at a wavelength of 587 nm. The analysis results showed that the organic C content in the five soil samples ranged from 1.096% to 3.866%, classified from low to high. The variation in organic C content was influenced by environmental factors such as depth, soil texture, and drainage conditions. This analysis is important for determining soil fertility levels and supporting sustainable agricultural land management.
Penetapan Fosfor Tersedia pada Sampel Tanah Menggunakan Metode Olsen & Bray I Nur Kholifah, Azzahra; Pawestri, Niken; Utami, Maisari
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 10 No. 2 (2025): Volume 10, ISSUE 2, 2025
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol10.iss2.art3

Abstract

Quantitative analysis was conducted on seven soil samples to determine available phosphorus (P), an essential macronutrient for plant growth and development. This study aimed to compare the effectiveness of two extraction methods, Olsen and Bray I, in measuring phosphorus availability in soils with different chemical characteristics, as well as to provide an overview of soil fertility levels based on the obtained results. The available P content was measured using the Olsen & Bray I methods with a single-beam UV-Visible spectrophotometer. Four soil samples (TH.2278, TH.2279, TH.2280, and TH.2281) were analyzed using the Olsen method, while three samples (TH.2267, TH.2268, and TH.2269) were analyzed using the Bray I method. Based on the Olsen method, samples TH.2278 and TH.2279 contained 34.8270 ppm and 50.5795 ppm P₂O₅, respectively, both classified as very high. In contrast, sample TH.2280 showed a concentration of 3.9325 ppm (very low category), and sample TH.2281 had 8.9920 ppm (low category). Using the Bray I method, sample TH.2267 contained 39.9138 ppm P₂O₅ (very high category), while TH.2268 and TH.2269 contained 1.7534 ppm and 5.3627 ppm, categorized as very low and low, respectively. Overall, three samples (TH.2278, TH.2279, and TH.2267) exhibited very high levels of available phosphorus, while samples TH.2280, TH.2281, TH.2268, and TH.2269 fell within the low to very low categories. These findings indicate that phosphorus availability is strongly influenced by soil chemical conditions, with the Olsen method being more suitable for neutral to alkaline soils and the Bray I method being more responsive to acidic soils. For soils with very high phosphorus levels, phosphate fertilization should be temporarily discontinued to prevent nutrient imbalance and environmental risks. Conversely, soils with low phosphorus levels require regular monitoring and periodic phosphate fertilization to maintain adequate soil fertility.
Formulasi Kosmetik Lip Balm Tabir Surya Dengan Kombinasi Kitosan dan Ekstrak Kulit Buah Naga Merah (Hylocereus polyrhizus) Salmahaminati; Dyah Nuraini, Herdita; Indah Fajarwati, Febi
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 10 No. 2 (2025): Volume 10, ISSUE 2, 2025
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol10.iss2.art4

Abstract

This research involved formulating lip balm using a combination of chitosan and red dragon fruit peel as active ingredients in the lip balm formula. The purpose of this research is to learning about lip balm’s physical and chemical properties, which involves adding chitosan and red dragon fruit peel, determining lip balm formulation with various concentrations of red dragon fruit peel, and understanding betalain compounds in red dragon fruit peel as antioxidants using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. Based on the phytochemical screening and antioxidant test, the extract can be used as an active ingredient in cosmetics, and the antioxidant value IC50 is 0,675 mg/mL. However, this antioxidant's effectiveness is classified as low because of some environmental factors. There are 6 lip balm formulas, which are F0A, F0B, F1, F2, F3, and F4. All of the lip balm formulas have fulfilled the requirements of a lip balm product, like organoleptic test, pH test, hedonic test, and adhesive strength test. The result of the SPF test shows that lip balm formulas F0A, F0B, F1, and F2 are classified as maximum protection. Meanwhile, lip balm formulas F3 and F4 are classified as ultra protection with an SPF value >15
Formulation of Sunscreen Body Lotion with A Combination of Chitosan and White Turmeric (Curcuma zedoaria Rosc.) Aminati, Salmah; Putri Arini, Regita; Dyah Nuraini, Herdita; Indah Fajarwati, Febi
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 10 No. 2 (2025): Volume 10, ISSUE 2, 2025
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol10.iss2.art5

Abstract

In this study, body lotion was made in four formula variations from white turmeric and chitosan as natural active ingredients. The objectives of this study were determine whether chitosan could be used as a good emulsifier in body lotion, to determine whether white turmeric could be used as a sunscreen in body lotion, and to determine the physical and chemical properties of body lotion resulting from the combination of chitosan and white turmeric. Characterized results of Chitosan using FTIR and obtained functional groups, namely O-H, C-H, C=O, N-H, and C-H with a %DD value 86,47%. White turmeric simplisia was characterized using FTIR and obtained functional groups O-H, C-H, and C=O, indicating the possible presence of chromophore groups in curcumin. A phytochemical screening test result showed that white turmeric contains alkaloids and flavonoids. There were four formulation variations, namely F0, F1, F2, and F3. Physical quality tests were conducted, including organoleptic, homogeneity, pH, stability, hedonic, irritation, and SPF tests. There were two body lotion formulas that met the requirement. In the hedonic test, F0 and F1 were preferred by the respondents. The maximum SPF value of the body lotion preparation in formula F3 was 20,00487, which falls into the ultra protection category.

Page 12 of 12 | Total Record : 114

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