scholarly journals Pengaruh Ion Hg(II) Terhadap Efektivitas Fotoreduksi Ion Cu(II) Terkatalisis TiO2 dalam Limbah Cair Industri Kerajinan Perak di Desa Ungga Kec. Praya Lombok Tengah

2019 ◽  
Vol 6 (1) ◽  
pp. 75 ◽  
Author(s):  
Husnul Hatimah
Keyword(s):  
Laboratory Testing ◽  
Adsorption Process ◽  
Uv Light ◽  
Atomic Absorption Spectrophotometry ◽  
Metal Reduction ◽  
Tio2 Photocatalysts ◽  
Absorption Spectrophotometry ◽  
Aas Method ◽  
The Difference ◽  
Closed Reactor

In this study a study of the effect of TiO2 photocatalysts and Hg (II) ions in thewastewater of the silver industry in Ungga Village, Kec. PrayaKab. CentralLombok to the effectiveness of Cu (II) photoreduction which is catalyzed byTiO2. The photoreduction process is carried out by irradiating liquid wastecontaining Cu (II) and Hg (II) ions without or by adding TiO2 photocatalystpowder in a closed reactor equipped with UV light. The condition of thephotoreduction process is 50 mL of silver waste containing Cu (II) and Hg (II)with a reaction time of 24 hours and a mass of TiO2 20 mg at 10 ppm Cu (II) ionconcentration. Photoreduction results are determined based on the difference inthe concentration of Cu (II) ions with the concentration of residual Cu (II) ionsin silver waste without the addition of TiO2 photocatalysts. Furthermore, thedata obtained compared to the results of Cu (II) photoreduction catalyzed bypure TiO2 laboratory scale. The amount of metal in the mixture was determinedby the Atomic Absorption Spectrophotometry (AAS) method. The results showedthat in silver handicrafts containing Cu (II) and Hg (II) ions the addition of TiO2can increase the effectiveness of Cu (II) photoreduction from 6.57% to 33.38%,which begins with the adsorption process. Hg (II) in silver handicraft wastecauses inter-metal reduction competition so that it can reduce the effectiveness ofCu (II) ion photoreduction catalyzed by TiO2 by 9.84% when compared to thepercentage of Cu (II) ion Ti2O scale scale laboratory testing.

Atomic Absorption Spectrophotometric Method for Determination of Water-Soluble Copper in Water-Insoluble Copper Fungicides: CIPAC Collaborative Study. Comparison with Bathocuproine Method

1981 ◽  
Vol 64 (1) ◽  
pp. 75-78
Author(s):  
F Sánchez Rasero ◽  
◽  
P G Balayannis ◽  
H P Beyers ◽  
E Celma ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
The United States ◽  
Atomic Absorption Spectrophotometry ◽  
Water Soluble ◽  
Absorption Spectrophotometry ◽  
Aas Method ◽  
Standard Deviations ◽  
The Difference

Abstract An atomic absorption spectrophotometric (AAS) method was collaboratively studied by 8 laboratories from Africa, the United States, Australia, and Europe. The samples were dispersed in deionized water. After centrifuging and filtering, the water-soluble copper in the filtrate was acidified and measured by atomic absorption spectrophotometry, in an airacetylene flame, at 324.7 nm. The results from 7 laboratories were satisfactory and no unfavorable comments were received. Repeatability standard deviations ranged from 0.005 to 0.023, and reproducibility standard deviations ranged from 0.012 to 0.062. When compared with the bathocuproine method, the difference in bias between both methods is not significant. They were both adopted as full CIPAC methods, with the bathocuproine method as the referee method. Both methods have been adopted official first action.

scholarly journals UTILIZATION OF PINEAPPLE LEATHER WASTE (ANANAS COMOCUS) AS AN OKSALATE ACID SOURCE TO IMPROVE THE EFFECTIVENESS OF Cu (II) IONALIZED ION PHOTOREDUCTION OF TiO2

2013 ◽  
Vol 1 (2) ◽  
pp. 156
Author(s):  
Husnul Hatimah ◽  
Suryati Suryati
Keyword(s):  
Oxalic Acid ◽  
Reaction System ◽  
Atomic Absorption Spectrophotometry ◽  
Ion Concentration ◽  
Process Conditions ◽  
Oh Radicals ◽  
Tio2 Photocatalysts ◽  
Aas Method ◽  
The Difference ◽  
Uv Lamp

A study has been carried out on the effect of the addition of TiO2 photocatalysts and oxalic acid sourced from pineapple skin at various pH and concentrations, to the effectiveness of Cu (II) ion photoreduction catalyzed by TiO2. The photoreduction process was carried out by irradiating the mixture consisting of a solution of Cu (II) ion and TiO2 photocatalyst powder without or in the presence of oxalic acid in a closed reactor equipped with a UV lamp with stirring. The photoreduction process conditions are 50 mL of 10 ppm Cu (II) ion solution (0.157 mmol / L) and varying concentrations of oxalic acid, and 20 mg of TiO2, with a 24-hour reaction time. The photoreduction product was determined based on the difference in the initial Cu (II) ion concentration and the remaining Cu (II) ion concentration in the solution after the photoreduction process was determined by the Atomic Absorption Spectrophotometry (AAS) method. The results showed that the addition of TiO2 could increase the effectiveness of Cu (II) ion photoreduction from 9.03% to 43.22%, which was initiated by the adsorption process. The presence of oxalic acid in pineapple skin in a photoreduction reaction system with greater concentration causes a relatively high increase in Cu (II) ion photoreduction because oxalic acid can prevent recombination of electrons with OH radicals, so that the Cu (II) photoreduction process can run optimally due to the amount of relatively large number of available electrons.

Analisis Kandungan Mikroba, Formalin, dan Timbal (Pb) pada Tahu Sumedang yang Dijual Di Daerah Macet Cicurug, Ciawi, dan Cisarua Jawa Barat

2020 ◽  
Vol 6 (1) ◽  
pp. 087
Author(s):  
Rosy Hutami ◽  
M Fakih Kurniawan ◽  
Henna Khoerunnisa
Keyword(s):  
Content Analysis ◽  
Microbial Contamination ◽  
Atomic Absorption Spectrophotometry ◽  
Plate Count ◽  
Traffic Jam ◽  
Absorption Spectrophotometry ◽  
Traffic Jams ◽  
Total Plate Count ◽  
Microbial Analysis ◽  
Aas Method

Sumedang tofu is one of favorite foods for Indonesian society. But many sellers or producers are not aware to the food safety of sumedang tofu. The aims of this study were to analyze the microbial, formalin, and lead (Pb) contents in ready-to-eat sumedang tofu which were sold in traffic jams area in Cicurug, Ciawi, and Cisarua. The analysis were carried out by Total Plate Count (TPC) testing for microbial analysis, potassium permanganate reaction (KMnO4) testing for formaldehyde analysis, and atomic absorption spectrophotometry (AAS) method for lead content analysis in the samples. The results obtained for the microbial analysis were sumedang tofu that were sold in the traffic jam areas of Cicurug, Ciawi, and Cisarua contained contaminant above the treshold (1.4 x 105 colonies / gram to 2.2 x 105 colonies / gram of microbes). All of the samples of sumedang tofu were positive containing formaldehyde. Otherwise, there were no lead (Pb) content in all samples regarding to AAS analysis. This study concluded that the ready-to-eat sumedang tofu those were sold in traffic jam area in the Cicurug, Ciawi, and Cisarua were not suitable for consumption because it contained exceed microbial contamination and formalin which are harmful for human health.Keywords : formalin, microbes, sumedang tofu, lead, traffic jam

Comparison of Serum Calcium Measurements Obtained with the SMA 12/60 and by Atomic Absorption Spectrophotometry

1971 ◽  
Vol 17 (10) ◽  
pp. 1047-1049 ◽  
Author(s):  
S Raymond Gambino ◽  
Ivelice Fonseca
Keyword(s):  
Atomic Absorption ◽  
Serum Calcium ◽  
Large Scale ◽  
Colorimetric Assay ◽  
Internal Standard ◽  
Reference Method ◽  
Atomic Absorption Spectrophotometry ◽  
Laboratory Model ◽  
Absorption Spectrophotometry ◽  
The Difference

Abstract Comparable results are obtained when serum calcium is measured by a colorimetric cresolpthalein method on the Technicon SMA 12/60 and by atomic absorption spectrophotometry (Instrumentation Laboratory Model 153 instrument), with strontium as an internal standard. Sera from 250 patients with abnormal calcium concentrations, ranging from 4.9 mg/100 ml to 9.0 mg/100 ml, were measured by each method; the difference between the means for each method was only 0.04 mg/100 ml. The standard deviation of the difference between paired results was ±0.16 mg/100 ml. We were unable to discover any effect of drug or disease on the colorimetric assay, which therefore is suitable for use in large-scale surveys. On the other hand, the more precise atomic absorption spectrophotometry is suitable for use as a reference method. In addition, with an internal standard it is fast and simple, making it suitable for emergency assays of calcium 24 h a day.

Comparison of AOAC and Atomic Absorption Spectrophotometry Methods for Determining Sodium in Fertilizers: Collaborative Study

1983 ◽  
Vol 66 (5) ◽  
pp. 1234-1241
Author(s):  
Luis F Corominas ◽  
Roberto A Navarro ◽  
Pedro Rojas ◽  
◽  
M Aihara ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Sodium Content ◽  
Matched Pairs ◽  
High Potassium ◽  
Absorption Spectrophotometry ◽  
Low Sodium ◽  
Aoac Method ◽  
Aas Method

Abstract A collaborative study was carried out to compare AOAC method 2.147-2.150 for determining sodium in fertilizers with the atomic absorption spectrophotometric (AAS) method. Twelve synthetic NPK samples, 6 pairs of blind duplicates (0.06-8.5% Na), were sent to 22 collaborators; a total of 13 sets of results were received and evaluated by the modified matched pairs technique. The AAS method showed better performance in samples with low sodium content and high potassium content. The AAS method has been adopted official first action for determining sodium in fertilizers.

Optimization and in-house validation of the TDA-AAS method for mercury control in water and wastewater treatment plant sludges

2020 ◽  
Vol 12 (45) ◽  
pp. 5503-5513
Author(s):  
Salomé Fletcher ◽  
André Miranda ◽  
João Paiva ◽  
Maria João Benoliel ◽  
Cristina M. M. Almeida
Keyword(s):  
Thermal Decomposition ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Atomic Absorption Spectrophotometry ◽  
Water And Wastewater Treatment ◽  
Absorption Spectrophotometry ◽  
Water And Wastewater ◽  
Aas Method ◽  
Mercury Control

The validated thermal decomposition–amalgamation-atomic absorption spectrophotometry method as an adequate tool for the control of mercury in sludges.

scholarly journals EFEKTIVITAS FOTOREDUKSI ION Cu(II) TERKATALISIS TiO2 DALAM LIMBAH CAIR INDUSTRI KERAJINAN PERAK DI DESA UNGGA KEC. PRAYA LOMBOK TENGAH

2017 ◽  
Vol 5 (1) ◽  
pp. 19
Author(s):  
Husnul Hatimah Husnul Hatimah
Keyword(s):  
Adsorption Process ◽  
Liquid Waste ◽  
Pure Tio2 ◽  
The Other ◽  
Ion Concentration ◽  
Process Conditions ◽  
Tio2 Photocatalyst ◽  
The Difference ◽  
Uv Lamps ◽  
Closed Reactor

This research has been done to study the effect of addition of TiO2 photocatalyst in liquid waste of silver industry in Ungga Village, Kec. Praya Kab. Central Lombok on the effectiveness of photoreduction of Cu (II) ions which are catalyzed by TiO2. The photoreduction process is carried out by irradiating liquid waste containing Cu (II) ions without or with the addition of TiO2 photocatalyst powder in a closed reactor equipped with UV lamps. The photoreduction process conditions are 50 mL of silver waste containing Cu (II) with reaction time for 24 hours and a mass of TiO2 20 mg at each 10 ppm Cu (II) ion concentration. The photoreduction results are determined by the difference in the concentration of the starting Cu (II) ions with the residual Cu (II) ion concentration in the silver craft waste without or with the addition of TiO2 photocatalyst. Furthermore, the data obtained were compared to the results of photoreduction of Cu (II) ions pure TiO2 laboratory scale. The amount of metal in the mixture was determined by Atomic Absorption Spectrophotometric Method (AAS). The results showed that in silver handicraft waste containing Cu (II) ions, the addition of TiO2 can increase the effectiveness of the Cu (II) ion photoreduction from 6.57% to 33.38%, which begins with the adsorption process. The other ions cause inter-reduction competition metals so as to decrease the effectiveness of TiO2 catalysed Ti (II) ionic ferrication in silver handicrafts waste in Ungga Village Kec. Praya Kab.central Lombok

Phytoremediation of zinc polluted soil using sunflower (Helianthus annuus L.)

2021 ◽  
pp. 9-12
Author(s):  
Elda Soares ◽  
Abdul Hamid ◽  
Sarwoko Mangkoedihardjo
Keyword(s):  
Helianthus Annuus ◽  
Research Method ◽  
Atomic Absorption Spectrophotometry ◽  
Polluted Soil ◽  
Ex Situ ◽  
Garden Soil ◽  
Sunflower Seeds ◽  
Absorption Spectrophotometry ◽  
Soil Media ◽  
Aas Method

This study aimed at assessing the ability of sunflower to remediate zinc (Zn) impacted soils and the partitioning factors of Zn in soil-plants interactions. The research method used ex situ experiments using teddy bear sunflower seeds with 8 different treatments for each. This began with the preparation of the sample soil media on garden soil, and the seeding of sunflower seeds. This research was carried out for six months starting in August - December 2020, with Helianthus annuus plants with variations of the Zn. Various concentrations of Zn were applied, ranging from 50 ppm to 350 ppm. Laboratory analysis of Zn was carried out using the Atomic Absorption Spectrophotometry (AAS) method. The research results have revealed that roots have the ability to translocate more Zn than shoots, which suggests a phytoremediation mechanism. Sunflower plants are able to translocate Zn, which proves it reliable for phytoremediation of Zn-polluted soil.

Serum Copper in Schizophrenia in Nigerians

1975 ◽  
Vol 127 (2) ◽  
pp. 119-121 ◽  
Author(s):  
D. A. Olatunbosun ◽  
M. O. Akindele ◽  
B. K. Adadevoh ◽  
T. Asuni
Keyword(s):  
Atomic Absorption ◽  
Normal Control ◽  
Atomic Absorption Spectrophotometry ◽  
Serum Copper ◽  
Absorption Spectrophotometry ◽  
Control Subjects ◽  
Schizophrenic Patients ◽  
Healthy Control ◽  
The Difference ◽  
Average Serum

SummarySerum copper concentrations were determined by atomic absorption spectrophotometry in 102 schizophrenic patients and 95 healthy control subjects. The serum copper concentrations were significantly higher in the schizophrenic patients than in the normal control subjects. The average serum copper in schizophrenic females was higher than in schizophrenic males, but the difference was not statistically significant

scholarly journals The effect of difference in saliva pH against Hg release from amalgam restoration on in vitro research

2007 ◽  
Vol 19 (2) ◽  
Author(s):  
Oksana Megasari
Keyword(s):  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Group 4 ◽  
Amalgam Restoration ◽  
Group 3 ◽  
The Difference ◽  
Group 2 ◽  
The One ◽  
Group 1

Hg release from amalgam restoration is continuos as long as an amalgam in the mouth. The difference in saliva pH is one factor that influences Hg releasing from amalgam restoration. The purpose of this research was to find data the effect of the difference in saliva pH against Hg release from amalgam restoration. This research was a true experimental in vitro research. This research used 40 samples of premolar teeth of the maxilla, prepared in occlusal Class I, restored with amalgam and then divided into 4 Groups. Teeth belonging to Group 1 were immersed in saliva artificial with a pH content 5, Group 2 with a pH content of 6, Group 3 with a pH content of 7 as a control, and Group 4 with a pH content of 8. All tooth Groups were immersed for one week after condensation. Research data results analyzed using the One-Way Analysis of Variance (ANOVA). Research results measured using the Atomic Absorption Spectrophotometry (AAS) indicated that Group 1 with a pH content of 5 had the highest average release, namely, 19,276 ppb, followed by Group 4 with a pH content of 8, with a Hg release of 17,691 ppb, followed by Group 3 with a pH content of 7 as a control, with a Hg release of 13,702 ppb, and Group 2 with a pH content of 6 the lowest Hg release, namely 12,377 ppb. Summary of this research showed that there was no effect of saliva pH difference against Hg release from amalgam restoration.

Sign in / Sign up

Export Citation Format

Share Document