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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Jurnal Natur Indonesia Jurnal Sains Materi Indonesia Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research Jurnal Farmasi Andalas Jurnal Riset Kimia Jurnal Kimia dan Kemasan Elkawnie Jurnal Litbang Industri Lantanida Journal Indonesian Journal of Chemistry Jurnal Ecolab Molekul: Jurnal Ilmiah Kimia Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Hydrogen: Jurnal Kependidikan Kimia REACTOR : Journal of Research On Chemistry And Engineering Jurnal Kimia dan Kemasan Jurnal Litbang Industri Bulletin of Chemical Reaction Engineering & Catalysis al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Akademika Kimia

Safni Safni

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Andalas University, Kampus Unand Limau Manis Padang, 25163

Author-ID : 368143

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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SIMULTANEOUS DETERMINATION OF CADMIUM, COPPER AND LEAD IN SEA WATER BY ADSORPTIVE STRIPPING VOLTAMMETRY IN THE PRESENCE OF CALCON AS A COMPLEXING AGENT Deswati Deswati; Hamzar Suyani; Safni Safni; Umiati Loekman; Hilfi Pardi
Indonesian Journal of Chemistry Vol 13, No 3 (2013)
Publisher : Universitas Gadjah Mada

A selective and sensitive adsorptive stripping voltammetric (AdSV) procedure for the simultaneous determination of cadmium, copper and lead in the sea water was conducted. The aim of this research is to get optimum condition for simultaneous determination of cadmium, copper and lead. Adsorptive stripping voltammetry has been used for determination of trace amount of Cd(II), Cu(II) and Pb (II) by using calcon as a complexing agent. The parameters studied were variation of calcon concentration, pH, accumulation potential and accumulation time. In this study, the optimum conditions were calcon concentration of 0.6 mM, pH = 4.0, accumulation potential of -0.7 V and accumulation time of 80 sec. At the optimum conditions, the relative standard deviation were 8.78%, 3.12%, and 4.02% for Cd(II), Cu(II) and Pb(II) respectively for eight replicates (n = 8) measurements of 10 μg/L mixed standard solution of Cd(II), Cu(II) and Pb(II). The method was applied to the direct simultaneous determination of Cd(II), Cu(II) and Pb(II) in sea water around Bungus, Padang City. Concentration of Cd(II), Cu(II) and Pb(II) in samples were equal to 1.8 μg/L for Cd(II), 38.6 μg/L for Cu(II) and 0.7 μg/L for Pb(II) with recovery of 87.03%, 98.80%, and 95.73%, respectively.

THE METHOD DEVELOPMENT OF ANALYSIS Cd, Cu, Pb AND Zn IN SEA WATER BY ABSORPTIVE STRIPPING VOLTAMMETRY (ASV) IN THE PRESENCE OF CALCON AS COMPLEXING AGENT Deswati Deswati; Hamzar Suyani; Safni Safni
Indonesian Journal of Chemistry Vol 12, No 1 (2012)
Publisher : Universitas Gadjah Mada

A sensitive and selective absorptive stripping voltammetric (AdSV) method to determine Cd(II), Cu(II), Pb(II) and Zn(II) in sea water is proposed. The aim of this study was to get optimum condition for the determination of Cd(II), Cu(II), Pb(II) and Zn(II). Absorptive stripping voltammetry has been used for ultra trace determination of Cd(II), Cu(II), Pb(II) and Zn(II) using calcon as a complexing agent (ligand). In this case, the optimum conditions were reached at 0.1 M KCl supporting electrolyte, concentration of 0.5 mM calcon for Cd(II), Cu(II) 0.3 mM while 0.7 mM for Pb(II) and Zn(II), pH 6 for Cu(II) and pH 7 for Cd(II), Pb(II) and Zn(II), accumulation potential -0.5 V for Cu(II) and Pb(II) and -0.6 V for Cd(II) and Zn(II) and accumulation time 70 sec for Cd(II), 90 sec for Cu(II) and Pb (II) while 50 s for Zn(II). At the optimum condition the relative standard deviations were 7.80%, 4.25%, 8.70% and 0.86% for Cd(II), Cu(II), Pb(II) and Zn(II) respectively for eight replicates (n = 8) measurements of 10 μg/L Cd(II), Cu(II), Pb(II) and Zn(II). The method was applied for the direct determination of Cd(II), Cu(II), Pb(II) and Zn(II) in sea water around Bungus, Padang City. Concentration Cd(II), Cu(II), Pb(II) and Zn(II) in sample were 13.200 μg /L for Cd(II), 17.200 μg/L for Cu(II), 0.089 μg/L for Pb(II) and 62.000 μg/L for Zn(II) with recovery of 98.68%, 97.99%, 96.17% and 99.96% for Cd(II), Cu(II), Pb(II) and Zn(II), respectively.

Photocatalytic Degradation of Commercial Diazinon Pesticide Using C,N-codoped TiO2 as Photocatalyst Khoiriah Khoiriah; Diana Vanda Wellia; Jarnuzi Gunlazuardi; Safni Safni
Indonesian Journal of Chemistry Vol 20, No 3 (2020)
Publisher : Universitas Gadjah Mada

Diazinon (C12H21N2O3PS) is an effective pest controller that has been frequently used by farmers in agriculture. It is a nonspecific and highly toxic pesticide having low persistence in the environment and categorized as moderately hazardous class II. The degradation of commercial diazinon in aqueous solution was investigated by photocatalysis using low-energy activated C,N-codoped TiO2 as catalyst under visible-light. The influence of some parameters, i.e., catalyst concentration, the initial concentration of diazinon, initial pH of diazinon, and irradiation time on the diazinon degradation was studied. The amount of diazinon degradation was strongly influenced by all the above parameters. The results show that titania-modified enhanced the degradation percentage of diazinon, from 44.08% without a catalyst to 86.93% by adding 12 mg C,N-codoped TiO2 catalyst after 30 minutes visible-light irradiation. UV-visible spectrophotometer, HPLC, and COD analysis verified that diazinon was successfully degraded under photocatalysis visible.

Co-Authors -, Maizatisna -, Roswita -, Zulfarman Abinul Hakim Adlis Santoni Admi Admi Aldini, Tasya Amelia, Fitrah Anggraini, Deby Anna Fadhilla Arief Yandra Putra Bhayu Gita Bhernama BUSTANUL ARIFIN Chris Deviarny Deby Anggraini Deliza - Deliza, Deliza Desmiati - Deswati Deswati Dheasy Gustira Dina Nofebriani Dini Hariyati Adam Donanita, Tysa Dytta Fitria Elma Fadrita Rahman Emriadi - Eno Okta Patricia Era, Yuni Fadhilla, Anna Fardila Sari Febi Rahmi Febrina Arfi Fitra Febrianti Fitrah Amelia Fitrah Amelia fitri mairizki Fitri Mairizki, Fitri Fivi Mona Bareno Gustiana, Mega Hakim, Abinul Hamzar Suryani Hamzar Suyani Harza Dipajana Umardi Hazanita Jumiaty Hazanita Jumiaty Henny Lucida Hermansyah Aziz Hermansyah Aziz Hilfi Pardi Ibnu Irawan Imelda Imelda Jarnuzi Gunlazuardi Jihanul Khaira K Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah Khoiriah, Khoiriah Liansari, Oktanora Mai Efdi Mai Efdi Maizatisna - Maizatisna Maizatisna Marniati Salim Matlal Fajri Alif Mechy Rezita Wahyuni Mega Gustiana Muhamad Nasir Muhamad Nasir, Muhamad Neila Yenni Norman Ferdinal Novesar Jamarun Novesar Jamarun Nurul Pratiwi Oktanora Liansari Olly Norita Tetra Putri Arwanda Putri Perdana Roza Putri, Reza Audina Rahmi, Febi Rahmiana Zein Refilda Refilda Refinel - Reza Audina Putri Reza Audina Putri Roswita - Roza, Putri Perdana Sakai, T. Sakai, Tadao Salmariza Sy Sumaryati Syukur Suryati , Suryati Suryati Suryati Syukri - Syukri Arief Syukri Syukri Syukri Syukri Syukri Syukri T. Sakai Tadao Sakai Tommi Hermansyah Trisna Olinovela Trisna Ollinovela Umiati Loekman Umiati Loekman Umiati Loekman Upita Septiani Vanny Yulia Safitri Vepilia Wulanda Wellia, Diana Vanda Willy Cahya Nugraha Willy Cahya Nugraha, Willy Cahya Yefrida - Yefrida Yefrida Yetria Rilda Yuli Okta Fitriyani Yulizar Yusuf Yulizar Yusuf Yuni Era Zaimi Abdullah Zaimi Abdullah Zilfa Zilfa Zulfarman - Zulfarman Zulfarman Zulkarnain Chaidir

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Journal : Indonesian Journal of Chemistry