Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Irdhawati Irdhawati"'
Publikováno v:
Indonesian Journal of Chemistry, Vol 23, Iss 1, Pp 53-61 (2023)
The fabrication, optimization and validation of measurement using a modified carbon paste electrode (CPE) with dibenzo-18-crown-6 were carried out for the determination of paracetamol in commercial products. The pH, dibenzo-18-crown-6 concentration i
Externí odkaz:
https://doaj.org/article/61f82adbfc634a53991bdae895adf0e3
Publikováno v:
Journal of Pure and Applied Chemistry Research, Vol 11, Iss 1, Pp 38-45 (2022)
The method of digestion as a part of sample preparation is very important to determine the accuracy of the analysis result. In this study, the methods of wet and dry digestions were applied to determine of Fe content in several kinds of spinach obtai
Externí odkaz:
https://doaj.org/article/aadaeca0bcea44e197a54c25b162c484
Publikováno v:
Jurnal Kimia Valensi, Vol 6, Iss 2, Pp 185-191 (2021)
The voltammetry method is a field of electrochemistry that measures electric current at a certain potential, which can be used to determine the concentration of inorganic and organic compounds that can be oxidized or reduced. In this research, the di
Externí odkaz:
https://doaj.org/article/40e343d73c35456f9f4c0d030dbb9468
Autor:
Irdhawati Irdhawati, Ekki Inur Ingtyas Mawarni, Ayu Jyostosya Yotirani Arya Wijana, Feby Silvia Sitio, Ni Putu Gita Widi Saraswati, Emmy Sahara
Publikováno v:
Aceh International Journal of Science and Technology, Vol 9, Iss 3, Pp 177-186 (2020)
Voltammetry is an electroanalytical method measure current as a function of applied potential. The working electrode in the voltammetry method dramatically affects the result of the electrochemical analysis. Modification of the working electrode can
Externí odkaz:
https://doaj.org/article/29f8d05d4f1643019c7066c547b87c0e
Publikováno v:
Jurnal Riset Kimia, Vol 12, Iss 2 (2021)
In this study, the measurement of Cd(II) ion by anodic stripping voltammetry technique was conducted using bentonite modified carbon paste as working electrode (CPE-B). The performance of CPE-B was compared with carbon paste electrode without bentoni
Externí odkaz:
https://doaj.org/article/5713da682f044e68a819df879ddc3554
Publikováno v:
Jurnal Kimia Riset, Vol 4, Iss 2, Pp 111-120 (2019)
Terong ungu adalah salah satu jenis tanaman yang banyak dibudidayakan. Tingginya permintaan terong menyebabkan petani menggunakan pupuk dan pestisida dari bahan kimia untuk meningkatkan produksi. Penggunaan bahan kimia yang berlebihan dapat mencemari
Externí odkaz:
https://doaj.org/article/c8c5cda5003542548e0e371f71d93ed8
Publikováno v:
Jurnal Kimia Sains dan Aplikasi, Vol 22, Iss 6, Pp 227-234 (2019)
Preparation and validation of the Fe2O3 modified carbon paste electrode have been carried out for the analysis of dopamine by the voltammetry method. Validation parameters of carbon paste electrodes (CPA) tested include linear concentration range, Li
Externí odkaz:
https://doaj.org/article/a30b82ff1f9946e9a2a76819e896c279
Publikováno v:
Indonesian Journal of Chemical Research, Vol 7, Iss 2 (2020)
Teak sawdust is a waste of the furniture industry. The main compound content is cellulose, which contains hydroxyl groups so that can be used as adsorbent. This work aims to determine adsorption capacity and isotherm adsorption pattern of teak sawdus
Externí odkaz:
https://doaj.org/article/8e8743de7d054c2e8d84a9c0fbd8a937
Publikováno v:
Jurnal Kimia Valensi, Vol 4, Iss 2, Pp 168-173 (2018)
Pakcoy is one of the most popular vegetable. The use of synthetic fertilizers and pesticides contain heavy metals can contaminate pakcoy vegetable. This research aims to determine the validity of measurements and concentration of Fe in pakcoy using d
Externí odkaz:
https://doaj.org/article/31fe72c0ccf64b47b72914028ef7a0dc
Publikováno v:
Jurnal Kimia Riset, Vol 1, Iss 2, Pp 122-128 (2016)
ABSTRAK Analisis logam berat Cu(II) dilakukan dengan metode voltametri pelucutan anodik gelombang persegi. Penelitian ini bertujuan untuk mengetahui validitas metode voltametri pelucutan anodik yang digunakan dalam pengukuran kadar logam Cu(II) dal
Externí odkaz:
https://doaj.org/article/58fb87a936a24478885a02403b5ce346