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All Journal Jurnal Inovasi Teknik Kimia Urecol Journal. Part D: Applied Sciences Mestaka: Jurnal Pengabdian Kepada Masyarakat
Sari, Meidita Kemala
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Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Respons Siswa Terhadap Program Sekolah Binaan SMK Se-Riau Program Kimia Fakultas MIPA Dan Kesehatan UMRI Nasution, Hasmalina; Siregar, Sri Hilma; Rahayu, Anggi Putri; Syahri, Jufrizal; Prasetya, Prasetya; Hilma, Rahmiwati; Syafri, Rahmadini; Sari, Meidita Kemala
Mestaka: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 1 (2025): Februari 2025
Publisher : Pakis Journal Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58184/mestaka.v4i1.585

Abstract

The goal of education is to actively develop students' potential by establishing a learning environment and process. Most students still find learning chemistry in high school or trade school to be challenging. One way for universities to help schools grow and enhance secondary school students' skills is through the Assisted School Program. Students in this program receive training to help them develop a broad perspective, expose them to the working world, and encourage their innovative spirit. Students at the target school responded favorably to this exercise, as evidenced by the average proportion of their responses on the indicators of interest, responsiveness, and satisfaction that met positive criteria. Students at this aided school, SMK Negeri 2 Pekanbaru, responded actively to the activities 94% of the time, whereas SMK Negeri 1 Tualang received the fewest replies (72%). In general, student responses regarding their level of enthusiasm in the targeted school activities are excellent. Overall, the guided inquiry method's student replies were rated as good. This is demonstrated by the percentage of each statement falling into the very good category, the overall student response rate of 81.88%, and the pre-test and post-test results, which showed that it had an impact on students' knowledge growth as indicated by the higher post-test scores compared to the pre-test score.
ANALISA PENGUJIAN KADAR NITRAT, NITRIT DAN KLORIDA PADA AIR MINERAL DENGAN METODE SPEKTROFOTOMETRI UV – VIS DAN TITRIMETRI Hidayati, Retno; Nasution, Hasmalina; Sari, Meidita Kemala
Jurnal Inovasi Teknik Kimia Vol. 10 No. 4 (2025): October| INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v10i4.14257

Abstract

Udara merupakan kebutuhan esensial bagi kehidupan manusia, Kualitas air minum menjadi perhatian utama dalam upaya menjaga kesehatan masyarakat. Keberadaan senyawa nitrat (NO₃⁻), nitrit (NO₂⁻), dan klorida (Cl⁻) dalam air mineral perlu dikaji mengingat potensi toksisitasnya apabila melebihi ambang batas yang ditetapkan oleh standar nasional. Penelitian ini bertujuan untuk menentukan kadar nitrat, nitrit, dan klorida dalam beberapa sampel air mineral menggunakan metode spektrofotometri UV–Vis dan titrimetri argentometri. Penetapan kadar nitrat dilakukan pada panjang gelombang 220–275 nm, sedangkan nitrit pada 534 nm. Sementara itu, kadar klorida ditentukan dengan metode titrasi Mohr menggunakan larutan standar AgNO₃ dan indikator K₂CrO₄. Hasil pengujian menunjukkan bahwa kadar nitrat pada sampel A1, A2, dan A3 masing-masing sebesar 0,284 mg/L; 0,358mg/L; dan 2,090 mg/L. Kadar nitrit seluruh sampel terdeteksi <LOQ atau 0 mg/L. Sedangkan kadar klorida yang diperoleh sebesar 0,48 mg/L; 0,53mg/L; dan 3,39 mg/L. Seluruh nilai konsentrasi berada di bawah ambang batas maksimum sesuai SNI 3554:2015 untuk nitrat dan nitrit, serta Permenkes No. 2 Tahun 2023 untuk klorida. Dengan demikian, air mineral yang diuji memenuhi kriteria kelayakan konsumsi berdasarkan parameter kimia yang dianalisis.
The Analysis of Phosphorus and Potassium As Macronutrients And Zinc As A Micronutrient In Solid Organic Fertilizer Derived From Biowaste As An Applied Science Innovation Supporting SDG 2, 9, And 12 David, Daviella; Sari, Meidita Kemala; Siregar, Sri Hilma
Urecol Journal. Part D: Applied Sciences Vol. 5 No. 2 (2025): August-Dec
Publisher : Konsorsium LPPM Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

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Abstract

Sustainable agriculture plays a crucial role in achieving SDG 2 (Zero Hunger), SDG 9 (Industry, Innovation and Infrastructure), and SDG 12 (Responsible Consumption and Production). One strategic approach to achieving these goals is the utilization of solid organic fertilizers derived from biowaste, which can enhance soil fertility and strengthen food security. The effectiveness of such fertilizers is highly influenced by their macro- and micronutrient content, which must comply with national quality standards. This study analyzes the levels of phosphorus (P), potassium (K), and zinc (Zn) in three samples of solid organic fertilizer (PAP 01, PAP 02, and PAP 03) based on the Indonesian National Standard (SNI) 7763:2018, along with moisture content as an indicator of product stability. Phosphorus was analyzed using UV-Vis spectrophotometry, while potassium and zinc were measured using Atomic Absorption Spectrophotometry (AAS). The results showed moisture content ranging from 5.02% to 45.24%, P?O? from 1.47% to 4.00%, K?O from 1.58% to 2.86%, and Zn at 261.22 mg/kg, with good analytical precision (RPD and RSD < 5%). These findings indicate that solid organic fertilizers meet the minimum nutrient requirements for plant growth. The application of analytical chemistry in this study not only ensures product quality but also supports applied science innovation in promoting sustainable agriculture and community empowerment through science-based development.
Co-Authors David, Daviella Hasmalina Nasution Jasril Jasril Jufrizal Syahri Prasetya, Prasetya Rahayu, Anggi Putri Rahmadini Syafri Retno Hidayati Siregar, Sri Hilma