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All Journal Jurnal Ilmu Dasar JIMAD : Jurnal Ilmiah Mutiara Pendidikan Jurnal Standardisasi
Harry Budiman
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Religion Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Mathematics Social Sciences Other

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Chemicals Identification Related To The Chemical Weapons Convention During The 15th Interlabory Proficiency Test Sri Sumartini; Harry Budiman; Nuryatini Nuryatini; Puspa Dewi
Jurnal ILMU DASAR Vol 9 No 1 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.476 KB)

Abstract

Identification of some chemical weapons in the water and organic sample has been carried out during 15th proficiency testing hold by OPCW (Organisation Prohibition of Chemical Weapon). Sample preparation method was adopted from Recommended Operational Procedure (ROP) from OPCW and Helsinki University, Finlandia. Prepared sample was identified by gas chromatography (FID and FPD), gas chromatography mass spectrometry (EI and CI mode) and Liquid chromatography mass spectrometry method.. From 7 spiking chemical weapons introduced to water and organic sample, 3 spiking chemicals could be identified (propylphosphonic acid, isoprophylphosphonic acid and 1,4 Bis 2-chloroethyl (thio) butane). One chemical was reported as Butyl S-2-diisopropylaminoethyl propylphosphonothiolate but obviously this is not a spiking chemical (category false positive identification).
Analisis senjata kimia melalui uji profisiensi organisation prohibition of chemical weapon (OPCW) Evita Boes; Dyah Styarini; Nuryatini Nuryatini; Harry Budiman
JURNAL STANDARDISASI Vol 11, No 1 (2009): Vol. 11(1) 2009
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v11i1.12

Abstract

Identification of some chemicals weapons in the water and organic sample has been carried out during 21th proficiency testing conducted by OPCW (Organisation Prohibition of Chemical Weapon). The samples were prepared and analysed in accordance with the principles describe in the work instructions for the preparation of test samples for OPCW proficiency test. The extract of samples were analysed and identified by GC-EI-MS, GCCI-MS, GC-FPD, GC-NPD and LC-MS. From 7 spiking chemical weapons introduced to water and organic sample, 3 spiking chemicals could be identified such as Bis(2,4,4 trimethylpentyl)methylphosphonate, 2-(N-Ethyl-N-isoprophylamino)etanol and Bis(2-diisoprophylaminoethyl)disulfide.
KETIDAKPASTIAN PENGUKURAN: EVALUASI, SUMBER-SUMBER DAN KONTRIBUSINYA DALAM PEMBUATAN BAHAN ACUAN CAMPURAN GAS (N2O DALAM MATRIKS N2) SECARA GRAVIMETRI Muhammad Rizky Mulyana; Harry Budiman; Oman Zuas; Nur Tjahyo Eka Darmayanti
JURNAL STANDARDISASI Vol 20, No 1 (2018)
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v20i1.599

Abstract

Gas dinitrogen monoksida (N2O) merupakan salah satu komponen gas rumah kaca dengan konsentrasi atmosferik yang terus meningkat setiap tahun, sehingga dibutuhkan upaya mitigasi yang didukung dengan metode pengukuran yang tervalidasi. Berdasarkan ISO/IEC 17025, metode pengukuran harus divalidasi unjuk kerjanya menggunakan bahan acuan yang memenuhi persyaratan, salah satunya yaitu memiliki nilai konsentrasi yang tersertifikasi beserta ketidakpastiannya. Di Indonesia, beberapa perusahaan gas specialty telah memulai upaya memproduksi bahan acuan gas sendiri untuk memenuhi kebutuhan dalam negeri. Untuk mendukung upaya tersebut, dalam studi ini akan dibahas secara rinci sumber-sumber ketidakpastian bahan acuan gas N2O dan kontribusi dari masing-masing sumber, hingga diperoleh nilai ketidakpastian akhir melalui prosedur estimasi yang akurat dan dapat diterima secara internasional berdasarkan ISO 6142. Nilai ketidakpastian diestimasi berdasarkan eksperimen aktual pembuatan 5 buah bahan acuan gas N2O dengan konsentrasi yang berbeda secara gravimetrik. Hasil ketidakpastian akhir untuk bahan acuan gas AH06018, AH06023, AH06021, AH06010, AH06020 berturut – turut adalah 2.528%, 3.490%, 4.215%, 4.785%, 5.292%. Adapun sumber ketidakpastian terbesar berasal dari fraksi mol komponen dalam parent gas, yang kontribusinya meningkat seiring bertambahnya pengenceran. Sementara itu, kontribusi ketidakpastian dari massa gas yang ditransfer mengalami penurunan dengan semakin rendahnya konsentrasi N2O. Berdasarkan hasil tersebut, disimpulkan bahwa nilai ketidakpastian konsentrasi bahan acuan meningkat seiring bertambahnya pengenceran, dan sumber ketidakpastian yang memberikan kontribusi terbesar adalah fraksi mol komponen dalam parent gas. Diharapkan hasil studi ini dapat menjadi acuan bagi produsen bahan acuan gas lokal dalam mengestimasi ketidakpastian secara tepat, serta meminimalkan kontribusi sumber-sumber ketidakpastian yang telah dibahas secara rinci.
Penguatan Kompetensi Profesional Guru Berbasis Refleksi dan Best Practice (Studi di Sekolah Dasar Negeri Kota Cilegon) Ifa Hafiroh; Harry Budiman; Inti Hujah; Eno Astriyani; Siti Laela
JIMAD: Jurnal Ilmiah Mutiara Pendidikan Vol. 4 No. 2 (2026): JIMAD - MEI
Publisher : PT. Penerbit Tiga Mutiara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61404/jimad.v4i2.507

Abstract

This study was motivated by the low level of professional competence among elementary school teachers despite the fact that most teachers have obtained certification and adequate academic qualifications. Curriculum changes, advances in educational technology, and the demands of 21st-century learning require teachers to possess adaptive, reflective, and collaborative professional competencies. The research problem focused on the influence of reflective practice and best practice on the professional competence of teachers at A-accredited public elementary schools in Cilegon City. The study employed a quantitative approach with a causal-comparative design involving 105 teachers selected through proportionate stratified random sampling. Data were collected using Likert-scale questionnaires and analyzed through multiple linear regression using EViews 12. The results revealed that reflective practice had a positive and significant effect on teachers’ professional competence, with a t-value of 4.697 and a significance value of 0.000. Best practice also demonstrated a positive and significant effect, with a t-value of 5.065 and a significance value of 0.000. Simultaneous testing indicated that reflective practice and best practice jointly had a significant effect on teachers’ professional competence, with an F-value of 43.72 and a coefficient of determination of 52.2%. The findings confirm that reflective and collaborative cultures are capable of improving teachers’ professional quality continuously through learning evaluation, sharing teaching experiences, and developing innovative instructional strategies. The novelty of this study lies in the simultaneous examination of reflective practice and best practice through a quantitative approach within the context of A-accredited public elementary schools in Cilegon City. The findings also demonstrate that best practice exerts a greater influence than reflective practice on the professional competence of elementary school teachers.
Co-Authors Anak Agung Istri Sri Wiadnyani Dyah Styarini Eno Astriyani Evita Boes Ifa Hafiroh Inti Hujah Muhammad Rizky Mulyana Muhammad Rizky Mulyana Nino Rinaldi Nur Tjahyo Eka Darmayanti Nuryatini Nuryatini Oman Zuas Puspa Dewi Sabar Simanungkalit Siti Laela