scholarly journals PENYERAPAN ION LOGAM Pb(II) DARI LARUTAN MENGGUNAKAN SERBUK DAUN PURING (Codiaeum variegatum)

2017 ◽  
Vol 8 (1) ◽  
pp. 34
Author(s):  
Fitriani Fitriani
Keyword(s):  
Hydrochloric Acid ◽  
Optimum Condition ◽  
Atomic Absorption ◽  
Metal Ion ◽  
Chemical Activation ◽  
Powder Metal ◽  
Chemical Methods ◽  
Codiaeum Variegatum ◽  
Leaf Powder ◽  
The Difference

The adsorption of metal ion Pb(II) by croton leaf powder through the activation of hydrochloric acid (HCl) or chemical methods has been researched. The research aimed to determine the optimum condition of croton leaf powder as adsorbent by variation of contacting time (30, 60, 90 and 120 minutes) and the difference in mass of adsorbent (1; 2; 3 and 4 grams ). This research began with downsizing the size of croton leafs become to 100 mesh, then was performed chemical activation by soaking the croton leaf powder with 2 N HCl. The adsorption was conducted by contacting the adsorbent with a solution of the sample based on contacting time and mass of adsorbent, then analyzed by Atomic Absorption Spectrophotometer (AAS). The result showed that the optimum condition of adsorption was achieved at 4 grams adsorbent by contacting time in the 60 minutes with Pb(II) adsorbed 1,76 mg/L or 35,2 %. Based on this findings, we concluded that the increase in mass of adsorbent increased the adsorption power of metal ion Pb(II) by optimum contacting time. Keywords: adsorption, croton leaf powder, metal ion Pb(II)

scholarly journals IMMOBILIZATION OF Saccharomycess cereviceae BIOMASS ON CHITOSAN AND ITS APPLICATION AS AN ADSORBENT FOR Pb(II) ION

2011 ◽  
Vol 11 (2) ◽  
pp. 174-179 ◽  
Author(s):  
Hasri Hasri ◽  
Mudasir Mudasir ◽  
Nurul Hidayat Aprilita ◽  
Roto Roto
Keyword(s):  
Optimum Condition ◽  
Functional Groups ◽  
Contact Time ◽  
Metal Ion ◽  
Mass Ratio ◽  
Adsorption Experiment ◽  
Ion Removal ◽  
Before And After ◽  
The Difference

An application of Saccharomycess cereviceae biomass immobilized on chitosan (SC-Chi adsorbent) for Pb(II) ion removal was demonstrated. Adsorption experiment was conducted at various mass ratio of Saccharomycess cereviceae biomass to chitosan, contact time, pH of solution and concentration of cation. Total Pb(II) metal ion adsorbed was calculated from the difference of the amount of metal ion before and after adsorption which was measured by AAS. The results showed that optimum condition for adsorption of Pb(II) ion by the SC-Chi was achieved using mass ratio of Saccharomycess cereviceae to chitosan of 50% (w/w), pH solution of 7, contact time of 60 min and concentration of 25 mgL-1. The hydroxyl (-OH) and amino (-NH2) functional groups are believed to be responsible for the adsorption of Pb(II) ion by the adsorbent.

scholarly journals EFEKTIVITAS ADSORPSI LOGAM Pb2+ DAN Cd2+ MENGGUNAKAN MEDIA ADSORBEN CANGKANG TELUR AYAM

Konversi ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Erna Wati Ibnu Hajar ◽  
Reny Suryani Sitorus ◽  
Novi Mulianingtias ◽  
Fransiska Jawa Welan
Keyword(s):  
Adsorption Kinetics ◽  
Metal Ion ◽  
Chemical Activation ◽  
Order Kinetic ◽  
Chicken Egg ◽  
Physical Chemical ◽  
Zero Order Kinetics ◽  
Order Kinetic Model ◽  
Egg Shells ◽  
The Difference

Abstrak-Cangkang telur merupakan bagian terluar dari telur yang berfungsi memberikan perlindungan bagi komponen-komponen isi telur dari kerusakan secara fisik, kimia maupun mikrobiologis. Setiap cangkang telur memiliki 10.000-20.000 pori-pori sehingga diperkirakan dapat menyerap suatu solute dan dapat digunakan sebagai adsorben untuk menjerap logam seperti Pb2+ dan Cd2+. Tujuan dari penelitian ini untuk mengetahui efektivitas cangkang telur ayam sebagai adsorben dengan variasi waktu kontak yaitu 15, 30, 45 menit dan perbedaan massa adsorben yaitu 3, 6, dan 9 gram, serta untuk mengetahui model kinetika adsorpsi yang tepat pada penjerapan logam Pb2+ dan Cd2+. Penelitian ini diawali dengan pengecilan ukuran cangkang telur ayam menjadi 200 mesh, kemudian dilakukan aktivasi kimia dengan merendam cangkang telur ayam dengan larutan HCl 0,1 M. Selanjutnya dilakukan proses adsorpsi dengan mengontakkan adsorben dengan larutan sampel berdasarkan perbedaan waktu dan massa adsorben, konsentrasi larutan hasil adsorpsi kemudian dianalisa dengan menggunakan AAS. Hasil penelitian menunjukkan bahwa % efektivitas penjerapan Pb2+ tertinggi yang dapat dihasilkan dari adsorben cangkang telur ayam yaitu 91,1242% pada berat adsorben 9 gram dengan waktu pengontakan 15 menit, sedangkan pada penjerapan Cd2+ yang dapat dihasilkan dari adsorben cangkang telur ayam yaitu 99,9515% pada berat adsorben 9 gram dengan waktu pengontakan 15 menit. Kinetika adsorpsi penjerapan Pb2+ pada 3, 6, dan 9 gram mengikuti model kinetika orde 2, sedangkan kinetika adsorpsi penjerapan Cd2+ pada 3 gram mengikuti model kinetika orde 0. Kata kunci: Cangkang Telur Ayam, Efektivitas, Kinetika Adsorpsi Abstract-An egg shells is the part of the egg which serves to provide protection for the components of the egg contents from damage because of physical, chemical and microbiological activity. Egg shells has 10,000-20,000 pores that are expected to absorb a solute and can be used as adsorbent to adsorb metals ion such as Pb2+ and Cd2+. The aims of this study were to examine the effectivity of chicken egg shells as adsorbent by variation of contacting time ie 15, 30, 45 mins and the difference in mass of adsorbent which are 3, 6  and 9 grams, as well as to determine the kinetics model of adsorption on metal ion of Pb2+ and Cd2+. This study begins with downsizing the size of chicken egg shells become to 200 mesh, then was performed a chemical activation by soaking the chicken egg shells with 0.1 M HCl. The adsorption was performed by contacting the adsorbent with a solution of the sample is based on the contacting time and mass of adsorbent, the concentration of the resulting solution adsorption then analyzed by AAS. The results showed that the % effectiveness adsorption of the Pb2+ highest that can be produced from chicken egg shells adsorbent that is 91.1242% by weight of 9 gram adsorbent by contacting time 15 mins, while on the adsorption Cd2+ can be produced from chicken egg shells adsorbent is 99.9515% on the weight of the adsorbent 9 grams with time contacting the 15 minutes. Pb2+ adsorption kinetics at 3, 6  and 9 grams following the second-order kinetic model, whereas the adsorption Cd2+ adsorption kinetics at 3 grams following the model zero-order kinetics. Keywords: Chicken Egg Shells, Effectiveness, Adsorption Kinetics

Variasi Penambahan Tepung Daun Kelor (Moringa Oleifera Lam.) pada Pembuatan Flakes Ditinjau dari Sifat Fisik, Sifat Organoleptik dan Kadar Kalsium

2017 ◽  
Vol 19 (1) ◽  
pp. 31-35
Author(s):  
Frieda Rosita Majid ◽  
Nur Hidayat ◽  
Waluyo Waluyo
Keyword(s):  
Physical Characteristic ◽  
Nutritional Value ◽  
Calcium Content ◽  
Organoleptic Characteristics ◽  
High Calcium ◽  
Randomized Experimental Design ◽  
Leaf Powder ◽  
The Difference ◽  
The Tropics ◽  
Moringa Oleifera Lam

Background:Moringa (Moringaoleifera Lam.) Is a plant of high nutritional value, grows scattered in the tropics and sub-tropics, but utilization is still low. Each section has its benefits Moringa one part is the Moringa leaves contain a high calcium. In 100 grams of material, fresh Moringa leaves contain as much as 440 mg of calcium in the form of flour whereas if it contains as much as 2,003 mg of calcium. One of its use in the manufacture of flakes added. Objective: Know the difference physical harateristi, organoleptic characteristic and calcium levels in flakes variations addition of Moringa leaf powder. Methods: The study is a randomized experimental design with simple, includes four kinds of treatments, two replications with two experimental units. Observations of physical characteristic were analyzed by descriptive, the organoleptic characteristic of data analysis using statistical test Kruskal-Wallis continued Mann-Whitney and methods of test calcium content using permanganometri then the data were analyzed descriptive. Results: The physical characteristics of flakes greenish-yellow, slightly fragrant aroma typical of flakes, rather unpleasant taste typical of Moringa leaves and a slightly crunchy texture. Organoleptic characteristics the color of flakes with moringa leaf powder 5%, the aroma of the flakes without addition moringa leaf powder, the flavour of flakes with additions moringa leaf powder 5% and the texture of flakes with additions moringa leaf powder 7,5% most prefered panelist and high levels calcium of flakes with additions 10% moringa leaf powder. Conclusion: There is a difference variations addition of moringa leaf powder on physical, organoleptic characteristic (color) and the level of calcium flakes.Flakes with the addition of 5% moringa leaf powder is the most prefered panelist.   Keywords:Moringa Leaf Flour, Flakes, Physical characteristic, organoleptic, Calcium

Photodegradation of New Methylene Blue N in Aqueous Solution Using Zinc Oxide and Titanium Dioxide as Catalyst

2012 ◽  
Author(s):  
Rusmidah Ali ◽  
Boon Siew Ooi
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Optimum Condition ◽  
Metal Ion ◽  
Optimum Ratio ◽  
Photodegradation Rate ◽  
Uv Visible ◽  
Uv Lamp

Dalam kajian ini, ZnO dan TiO2 digunakan sebagai fotomangkin dalam pendegradasian pewarna New Methylene Blue N (NMBN). Kadar fotodegradasi diukur menggunakan alat spektrofotometer UV-Vis. Dalam kajian ini, New Methylene Blue N menunjukkan nilai serapan pada λ = 590 nm dan λ = 286 nm. Lampu UV (λ = 354 nm) digunakan dalam proses fotodegradasi. Dalam proses degradasi menggunakan ZnO menunjukkan 81.42% NMBN terdegradasi pada λ = 590 nm dan 77.75% pada λ = 286 nm. Sebaliknya, degradasi menggunakan TiO2 adalah 25.68% pada λ = 590 nm dan 26.37% pada λ = 286 nm. Peratus degradasi New Methylene Blue N ialah 88.89% dan 68.94% pada masing-masing λ = 590 nm dan λ = 286 nm apabila ditambahkan dengan H2O2. Campuran ZnO dan TiO2 dalam nisbah 85: 15 (0.085 g; 0.015 g) merupakan campuran fotomangkin yang paling optimum iaitu dengan peratus degradasi NMBN sebanyak 96.97% dan 93.61% pada λ = 590 nm dan λ = 286 nm. Penambahan ion logam Cu2+ memberikan peratus degradasi tertinggi berbanding ion logam lain iaitu 83.83% pada λ = 590 nm. Penambahan ion logam Pb2+ memberikan peratus degradasi tertinggi pada λ = 286 nm iaitu 81.25% pewarna terdegradasi. Keadaan optimum dicapai pada pH 5.90, dengan peratus degradasi tertinggi iaitu 92.84% dan 89.30% pada masing-masing λ = 590 nm dan λ = 286 nm. Kata kunci: New Methylene Blue N; fotodegradasi; larutan; ZnO; TiO2 In this study, ZnO and TiO2 are used as photocatalyst to degrade the dye, New Methylene Blue N (NMBN). The photodegradation rate was measured using UV-Visible spectrophotometer. In this study, New Methylene Blue N showed absorption values at λ = 590 nm and λ = 286 nm. UV lamp (λ = 354 nm) is used in the photodegradation process. Results showed that ZnO is a better photocatalyst compared to TiO2. The degradation by ZnO showed that 81% of NMBN was degraded at λ = 590 nm and 77.75% at λ = 286 nm. In contratst, the degradation using TiO2 was 25.68% at λ = 590 nm and 26.37% at λ = 286 nm. The percent degradation of New Methylene Blue N is 88.89% and 68.94% at λ = 590 nm and λ = 286 nm respectively when H2O2 was added. A mixture of ZnO and TiO2 in the ratio of 85: 15 (0.085 g: 0.015 g) is the most optimum ratio for the mixed photocatalyst where the degradation percentage of NMBN are 96.97% and 93.61% at λ = 590 nm and λ = 286 nm. The addition of Cu2+ metal ion gave the highest percentage of degradation (83.83% at λ = 590 nm) compared to other metal ions. The addition of Pb2+ gave the highest percentage of degradation at λ = 286 nm with 81.25% degradation of the dye. The optimum condition was achieved at pH 5.90, which gave the highest percentage degradation, 92.84% and 89.30% at λ = 590 nm and λ = 286 nm respectively. Key words: New Methylene Blue N; photodegradation; aqueous; ZnO; TiO2

scholarly journals Prakonsentrasi Ion Cd(II) dalam Sampel Pupuk Nitrogen, Fosfor dan Kalium (NPK) Menggunakan Alumina Teraktivasi sebagai Material Pengisi Kolom

2020 ◽  
Vol 16 (2) ◽  
pp. 152
Author(s):  
Lossi Hotmaida Simanjuntak ◽  
Erwin Erwin ◽  
Aman Sentosa Panggabean
Keyword(s):  
Optimum Condition ◽  
Atomic Absorption ◽  
Limit Of Detection ◽  
Analytical Performance ◽  
Atomic Absorption Spectrophotometer ◽  
Filler Material ◽  
Activated Alumina ◽  
Fertilizer Sample ◽  
Recovery Percentage ◽  
Npk Fertilizer

<p>Prakonsentrasi ion Cd(II) dalam sampel pupuk nitrogen, fosfor dan kalium (NPK) menggunakan alumina teraktivasi sebagai material pengisi kolom telah dilakukan. Alumina terlebih dahulu diaktivasi dengan NaOH pada pH 8 sebelum dimasukkan ke dalam kolom. Beberapa parameter penting dalam tahapan prakonsentrasi yang dapat meningkatkan kinerja analitik pengukuran telah ditentukan menggunakan instrumen spektrofotometer serapan atom (SSA). Hasil penelitian menunjukkan kondisi optimum tahapan prakonsentrasi ion Cd(II), adalah pada volume sampel 10 mL, volume HNO3 adalah 4 mL pada konsentrasi 0,5 M, dengan nilai kapasitas retensi adalah 1,4113 mg Cd(II)/g alumina. Kinerja analitik pengukuran metode sangat baik, ditunjukkan dengan nilai batas deteksi metode adalah 2,7997 μg/L. Presisi metode dinyatakan sebagai persentase koefisien variansi adalah 4,03%. Penggunaan alumina sebagai bahan pengisi kolom dapat meningkatkan signal sebesar 2,5 kali dibandingkan dengan pengukuran ion Cd(II) secara langsung. Akurasi metode ini sangat baik, dengan nilai persen perolehan kembali adalah 91,67 – 103,49%, menunjukkan bahwa matriks sampel tidak  mempengaruhi hasil pengukuran, sehingga metode ini dapat digunakan untuk analisis ion Cd(II) dalam sampel pupuk NPK. Estimasi ketidakpastian metode ini juga telah dihitung dan ditunjukkan dengan nilai persen ketidakpastian adalah 14,16%.</p><p><strong>Preconcentration of Cd(II) Ion in Nitrogen, Phosphor, and Kalium (NPK) Fertilizer Sample Using Activated Alumina as a Column Filler Material</strong>. The research about preconcentration of Cd(II) in NPK fertilizer using activated alumina as a column filler material was done. The column used a filler material of alumina previously activated using NaOH at pH 8. Some important parameters in the preconcentration stage are able to increase the analytical performance, determined using atomic absorption spectrophotometer (AAS). The result of the research shows the optimum condition of preconcentration stage Cd(II) ion are volume of the sample was 10 mL, the volume of eluent HNO3 was 4 mL with a concentration of 0.5 M, with the retention of capacity value was 1.4113 mg Cd(II)/g alumina. The analytical performance of this method is good, shown with the limit of detection value was 2.7997 μg/L. The precision of this method was indicated by the percentage of the coefficient variance of 4.03%. Alumina used as a filler column can increase the signal up to 2.5 times for direct Cd(II) ions measurement. The accuracy of this method is excellent, with the recovery percentage value was 91.67 – 103.49%, indicating that the matrices of NPK fertilizer give no effect on the results of measurements, and this method was capable of analyzing Cd(II) ions in NPK fertilizer. The uncertainty of this method was estimated as the percentage of the uncertainty of 14.16%.</p>

scholarly journals Storage and Condition of Biomass Influence to Biosorption of Lead (II) and Zinc(II) by Saccharomyces cerevisiae Biomass

2010 ◽  
Vol 1 (1) ◽  
pp. 11-15
Author(s):  
Jasmidi Jasmidi ◽  
Eko Sugiharto ◽  
Mudjiran Mudjiran
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Atomic Absorption ◽  
Room Temperature ◽  
Final Concentration ◽  
Biomass Storage ◽  
Lead And Zinc ◽  
The Difference ◽  
Biomass Influence ◽  
And Storage ◽  
Zinc Storage

The influence of length and condition of Biomass Storage on the biosorption of lead and zinc that present together in a solution by Saccharomyces cerevisiae biomass were studied. In this experiment, variables of length and condition of biomass storage were examined. Concentration of lead and zinc were determined by atomic absorption spectrophotometric (AAS) using air-acetilene as atomizing flame. Loading of lead and zinc on the biomass were determined as the difference between the initial and the final concentration of lead and zinc in the solution. Biosorption of lead and zinc were influenced by condition and storage of the biomass. Storage of biomass in the room temperature for one week cause an increasing uptake. Storage for longer period result in decrease of lead and zinc uptake. Storage of biomass in a freezer up to 2 weeks increased the uptake of lead, but did not influence the uptake of zinc. Storage for longer period decreased the uptake of both of lead and zinc. For all condition the uptake of lead higher than the uptake of zinc by Saccharomyces cerevisiae.

Flameless Atomic Absorption Spectroscopy of Plasma Chromium

1980 ◽  
Vol 17 (3) ◽  
pp. 144-147 ◽  
Author(s):  
David A Thompson
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Analytical Signal ◽  
Plasma Samples ◽  
Control Groups ◽  
Flameless Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
The Mean ◽  
The Difference

A flameless atomic absorption spectroscopy method has been developed for the measurement of chromium. Background correction has been modified by recording non-atomic absorption separately from atomic absorption on a double-pen recorder. This was achieved by using the prime spectral line of uranium (358·5 nm, within 0·6 nm of that of chromium—357·9 nm) and was possible only because of the absence of uranium from the plasma samples. Masking of the analytical signal at atomisation by non-atomic absorption was thus eliminated and gave the method a sensitivity of 3 pg and a detection limit of 150 pg/ml. Postprandrial plasma chromium values were measured in 32 insulin-treated diabetics (1·65 ±0·15 ng/ml), in 53 non-insulin treated diabetics (2·05 ± 0·16 ng/ml), and in 144 control non-diabetics (2·00 ± 0·14 ng/ml). The difference between the mean plasma chromium level of the insulin-treated diabetics and both the non-insulin treated diabetics and the control groups was statistically significant (p<0·05).

Colorimetric Determination of Terbutaline Sulfate and Orciprenaline Sulfate via Nitrosation and Difference Spectrophotometry

1987 ◽  
Vol 70 (3) ◽  
pp. 568-571 ◽  
Author(s):  
Mohamed E El-Sadek ◽  
Hisham E Abdel Latef ◽  
Afaf A Aboul Khier
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Nitrite ◽  
Colorimetric Method ◽  
Dosage Forms ◽  
Alkaline Media ◽  
Colorimetric Determination ◽  
Pharmaceutical Dosage Forms ◽  
Terbutaline Sulfate ◽  
The Difference

Abstract A colorimetric method is proposed for determination of terbutaline sulfate, orciprenaline sulfate, and their dosage forms. The suggested method depends on nitrosation of the 2 drugs by using sodium nitrite and hydrochloric acid. Addition of sodium hydroxide increases the intensity of the color developed. The difference between absorption values measured in acid and alkaline media is taken as a measure of concentration. Variables were carefully studied and optimized. Results for both compounds adhered to Beer's law over the range 2- 28 μg/mL. The method has proved to be accurate and precise for analysis of pharmaceutical dosage forms.

Optimized atomic absorption spectrophotometry of calcium in erythrocytes.

1987 ◽  
Vol 33 (11) ◽  
pp. 2004-2007 ◽  
Author(s):  
S Nomoto ◽  
S Shoji
Keyword(s):  
Hydrochloric Acid ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Graphite Tube ◽  
Optimum Conditions ◽  
Absorption Spectrophotometry ◽  
Flame Atomic Absorption ◽  
Flame Atomic Absorption Spectrophotometer ◽  
The Mean ◽  
Mean Concentration

Abstract We sought to establish optimum conditions for measuring calcium in erythrocytes by atomic absorption spectrophotometry. The conditions we selected are as follows. Wash one volume of fresh heparin-treated packed cells once with 30 volumes of isotonic buffered saline (pH 7.4) at a temperature somewhat exceeding 25 degrees C. Dilute the washed packed cells 10-fold with 12 mmol/L hydrochloric acid, and analyze the supernate for calcium. Measure the hematocrit of the washed packed cells, then analyze an aliquot of them for calcium, using a computer-readout type of flame or a non-flame atomic absorption spectrophotometer equipped with a pyrocoated graphite tube. The temperature program is 1000 degrees C for ashing [corrected] and 1800 degrees C for the atomizing cycle. Intraday and day-to-day reproducibility of the assay was 6.55% and 8.19%, respectively, at the mean concentration of calcium in the erythrocytes of healthy adults, which is 4.30 mumol/L.

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.

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