Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Jurnal Matematika & Sains
Saepudin Suwarsa
Kelompok Keilmuan Kimia Analitik, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung
Mathematics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Penyerapan Zat Warna Tekstil BR Red HE 7B Oleh Jerami Padi Saepudin Suwarsa
Jurnal Matematika & Sains Vol 3, No 1 (1998)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The straw in a agricultural wastes which is accumulated in a large quantity but still not much utilized, a part of it was burned and the other is used in a small part as an animals feed. At present, in Indonesia textile industries are so developed such that dyestuff and other colouring substances were very much used in the process especially in the dying process. Part of them was discarded as a waste  and becomes a pollutant, when it is discharged to the river in the environment. The straw have been investigated in a way that it can adsorb the dyestuff. Straw was first heated in 2% sodium hydroxide solution prior to usage followed by washing with water to neutral. The optimum adsorption was then determined. In the 0,1 M hydrochloric acid condition 1 gram of the straw adsorbed 9,8 mg of BR Red HE 7B dyes.
Pengembangan Metode Prakonsentrasi dengan Teknik Injeksi Alir untuk Analisis Cu2+ dan Pb2+ dalam Air Aliran Sungai Citarum dan Waduk Saguling Saepudin Suwarsa; Buchari Buchari; Aman Sentosa Panggabean
Jurnal Matematika & Sains Vol 13, No 3 (2008)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A research aiming at developing preconcentration method using ion exchange resin column for Cu2+ and Pb2+ ionsanalysis in the stream of Citarum river and the Saguling lake has been carried out. The preconcentration method wasperformed using a mini column filled with Dowex 50W-X8. The preconcentration method was developed to beincorporated with the flow injection analysis (FIA), for which water samples were passed through the mini column andby eluting with 3 M HCl, and the eluate was detected by an atomic absorption spectrophotometer detector. The optimalconditions for the best analytical performance with FIA-AAS method were 5 mL injection volume of waters samples, theeluent HCl concentration was 3 M and the volume was 1 mL. The limit of detection achieved by this method for Cu andPb ions were 5.26 dan 24.57 ppb, respectively. The reproducibility level shown by the coefficient of variance for thismethod was 2.11%. The method was applied to natural water samples with a recovery percentage of > 95%. The spikemethod develoved in this research, for matrices of water sample from Citarum river and the Saguling lake, has itsadvantage that the matrices did not affect the results of measurements.
Co-Authors Aman Sentosa Panggabean Buchari Buchari