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PENGARUH pH DAN ION ASING TERHADAP KINERJA ESI TIMAH (II) TIPE KAWAT TERLAPIS BERBASIS S-METHYL-N (METHYLCARBAMOYLOXY) THIOACETIMIDATE UNTUK MENENTUKAN KANDUNGAN TIMAH(II) DALAM MAKANAN KALENG Hasanah, Roisatul; Fardiyah, Qonitah; Atikah, Atikah
Jurnal Ilmu Kimia Universitas Brawijaya Vol 1, No 1 (2015)
Publisher : Jurusan Kimia, FMIPA Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.391 KB)

Elektroda selektif ion (ESI) timah(II) tipe kawat terlapis berbasis S-Methyl-N (Methylcarbamoyloxy) Thioacetimidate sebagai ionofor dengan bahan pendukung polivinilkorida (PVC) sebagai matrik polimer dan dioktilftalat (DOP) sebagai zat pemlastis dalam pelarut tetrahidrofuran (THF) telah dikembangkan. ESI timah(II) ini memiliki Faktor Nernst 29,49 mV/dekade konsentrasi, konsentrasi linier 10-3 – 10-8 M dan limit deteksi sebesar 8,79 x10-9M atau setara dengan 0,002 ppm timah(II). Pengaruh pH terhadap kinerja ESI timah(II) dilakukan melalui pengukuran respon potensial larutan timah(II) menggunakan buffer asetat pada pH 3-8. Koefisien selektivitas (Kij) ditentukan menggunakan metode larutan tercampur dengan ion asing Pb2+, Zn2+ , Fe3+ pada konsentrasi ion asing 10-5 M. Dari hasil penelitian diketahui bahwa ESI timah(II) berbasis S-Methyl-N -(Methylcarbamoyloxy) Thioacetimidate dapat digunakan secara optimal pada pH 4. ESI timah(II) mempunyai selektivitas yang baik terhadap ion timah(II) dengan nilai Kij < 1. Kinerja ESI timah(II) tipe kawat terlapis berbasis S-Methyl-N (Methylcarbamoyloxy) Thioacetimidate tidak diganggu dengan adanya ion asing Pb2+ ,Zn2+ , Fe3+ dengan urutan selektivitas Sn2+ > Pb2+ > Zn2+ > Fe3+. ESI timah(II) tipe kawat terlapis berbasis S-Methyl-N (Methylcarbamoyloxy) Thioacetimidate yang telah dibuat dapat digunakan untuk menentukan kandungan timah(II) dalam makanan kaleng dengan presisi 95,52% dan akurasi 93,8%. Dari uji statistik t dengan tingkat kepercayaan 95% menyatakan bahwa untuk metode potensiometri dan metode Spektrofotometri Serapan Atom tidak berbeda secara bermakna. Kata Kunci : Faktor Nernst, Potensiometri, Selektivitas, Spektrofotometri. Elektroda selektif ion (ESI) timah(II) tipe kawat terlapis berbasis S-Methyl-N (Methylcarbamoyloxy) Thioacetimidate sebagai ionofor dengan bahan pendukung polivinilkorida (PVC) sebagai matrik polimer dan dioktilftalat (DOP) sebagai zat pemlastis dalam pelarut tetrahidrofuran (THF) telah dikembangkan. ESI timah(II) ini memiliki Faktor Nernst 29,49 mV/dekade konsentrasi, konsentrasi linier 10-3 – 10-8 M dan limit deteksi sebesar 8,79 x10-9M atau setara dengan 0,002 ppm timah(II). Pengaruh pH terhadap kinerja ESI timah(II) dilakukan melalui pengukuran respon potensial larutan timah(II) menggunakan buffer asetat pada pH 3-8. Koefisien selektivitas (Kij) ditentukan menggunakan metode larutan tercampur dengan ion asing Pb2+, Zn2+ , Fe3+ pada konsentrasi ion asing 10-5 M. Dari hasil penelitian diketahui bahwa ESI timah(II) berbasis S-Methyl-N -(Methylcarbamoyloxy) Thioacetimidate dapat digunakan secara optimal pada pH 4. ESI timah(II) mempunyai selektivitas yang baik terhadap ion timah(II) dengan nilai Kij < 1. Kinerja ESI timah(II) tipe kawat terlapis berbasis S-Methyl-N (Methylcarbamoyloxy) Thioacetimidate tidak diganggu dengan adanya ion asing Pb2+ ,Zn2+ , Fe3+ dengan urutan selektivitas Sn2+ > Pb2+ > Zn2+ > Fe3+. ESI timah(II) tipe kawat terlapis berbasis S-Methyl-N (Methylcarbamoyloxy) Thioacetimidate yang telah dibuat dapat digunakan untuk menentukan kandungan timah(II) dalam makanan kaleng dengan presisi 95,52% dan akurasi 93,8%. Dari uji statistik t dengan tingkat kepercayaan 95% menyatakan bahwa untuk metode potensiometri dan metode Spektrofotometri Serapan Atom tidak berbeda secara bermakna. Kata Kunci : Faktor Nernst, Potensiometri, Selektivitas, Spektrofotometri. UnhideWhenUsed=/div

Inovasi Media Pembelajaran Berbasis Karakter di TPQ Nurul Ilmiyah Desa Kudubanjar Umardiyah, Fitri; Zuhriawan, M. Qoyum; Hasanah, Roisatul; Ilmi, Khusnul Abidah; Prihatiningtyas, Suci
Jumat Pendidikan: Jurnal Pengabdian Masyarakat Vol. 6 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat UNWAHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32764/abdimaspen.v6i1.5422

TPQ is an informal institution that parents rely on in educating children to learn the Qur'an from an early age. One of the things that is often underestimated in the management of TPQ is the learning process carried out without paying attention to aspects that can affect the character of children's interest and attractiveness to learn and love the Qur'an. Learning that takes place in TPQ seems to use methods, strategies, and learning media that are 'as is' and lack innovation. This problem occurs at TPQ Nurul Ilmiyah. The solution offered is through the innovation of al-Qur'an learning media in the form of Tilawati backsheet props. The implementation of the activity consists of two stages, namely assistance in preparing learning media and implementing media in learning. The results obtained are santri are more enthusiastic in learning because they use interesting media so that it is expected to increase interest and motivation in learning the Qur'an.

Students' Perception of Using Perplexity Application in Writing Skills at English Department Hasanah, Roisatul; Agustina, Ulfa Wulan; Nurul, Nurul; Nur, Luluk Choirun Nisak; Fikri, Akhmad Kanzul
SCHOOLAR: Social and Literature Study in Education Vol. 5 No. 2 (2025): October
Publisher : LPPM Universitas KH. A. Wahab Hasbullah

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This research aims to determine Unwaha students' perception of using the perplexity application in their writing skills. The respondents of this research were 24 students of English Department 5 term at KH. A. Wahab Hasbullah University, Jombang. The method used in this research is descriptive qualitative using triangulation in 3 stages, namely data reduction, data display, and conclusion. On the first day, students are introduced to the Perplexity application and asked to use Perplexity in learning writing skills. On the second day, students were asked to fill out questionnaires and interviews to collect data related to student perceptions through the Perplexity application in writing skills. The results of student responses stated that 74.8% of students responded well to the presence of perplexity in learning writing skills. This shows that perplexity has had a positive impact on students. Perplexity is considered a supporter in learning writing skills.

Inovasi Media Pembelajaran Berbasis Karakter di TPQ Nurul Ilmiyah Desa Kudubanjar Umardiyah, Fitri; Zuhriawan, M. Qoyum; Hasanah, Roisatul; Ilmi, Khusnul Abidah; Prihatiningtyas, Suci
Jumat Pendidikan: Jurnal Pengabdian Masyarakat Vol. 6 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat UNWAHA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32764/abdimaspen.v6i1.5422

TPQ is an informal institution that parents rely on in educating children to learn the Qur'an from an early age. One of the things that is often underestimated in the management of TPQ is the learning process carried out without paying attention to aspects that can affect the character of children's interest and attractiveness to learn and love the Qur'an. Learning that takes place in TPQ seems to use methods, strategies, and learning media that are 'as is' and lack innovation. This problem occurs at TPQ Nurul Ilmiyah. The solution offered is through the innovation of al-Qur'an learning media in the form of Tilawati backsheet props. The implementation of the activity consists of two stages, namely assistance in preparing learning media and implementing media in learning. The results obtained are santri are more enthusiastic in learning because they use interesting media so that it is expected to increase interest and motivation in learning the Qur'an.

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