scholarly journals Comparison of Vitros Dry Slide Technology for Determination of Lithium Ions with Other Methods

2006 ◽  
Vol 6 (2) ◽  
pp. 32-36
Author(s):  
Nafija Serdarević ◽  
Ivan Malešić ◽  
Franc Kozjek
Keyword(s):  
Reference Method ◽  
Absorption Spectrometry ◽  
Lithium Carbonate ◽  
T Test ◽  
Selective Electrode ◽  
Lithium Ions ◽  
Control Precision ◽  
Aas Method ◽  
Sera Samples

The lithium ions concentration in human serum was determined using Dry-slide technology Vitros 250 Analyser (Ortho Clinical Diagnostic), atomic absorption spectrometry (AAS) method Perkin Elmer 403 and ion-selective electrode (ISE) potentiometry AVL 9181. We compared lithium ions results in sample sera between these methods. Our reference method was AAS. We analyzed lithium ions concentration in 23 sera samples of patients after oral administration of lithium carbonate (3x 300mg) Jadran, Galen Laboratory Rijeka, by dry-slide technology, AAS and ISE methods. The quality control, precision, reproducibility and accuracy for Vitros dry slide technology were assessed. We established that the main difference between AAS method and dry slide technology was not statistically significant at p< 0.05 according to Student t-test. Therefore, the dry slide technology may be a useful alternative or it may even replace other methods, such as AAS. The main difference between dry slide technology and ISE methods was statistically significant at p<0.05 using Student t-test. By ISE method, we obtained considerably higher results, which may be explained by the presence of electrolytes or medicaments interfering with lithium ions.

scholarly journals Saliva and Serum Lithium Monitoring in Hospitalized Patients and Possibility to Replace Serum to Saliva

2008 ◽  
Vol 6 (4) ◽  
pp. 32-35 ◽  
Author(s):  
Nafija Serdarević ◽  
Franc Kozjek ◽  
Ivan Malešič
Keyword(s):  
Oral Administration ◽  
Pharmacokinetic Model ◽  
Absorption Spectrometry ◽  
Lithium Carbonate ◽  
Lithium Ions ◽  
Elimination Half ◽  
The Mean ◽  
Student Test ◽  
High Level

The lithium ions concentration in human serum and saliva was determined using dry-slide technology Vitros 250 Analyser (Ortho Clinical Diagnostic) and atomic absorption spectrometry Perkin Elmer 403 (AAS). We analyzed lithium ions in 100 serum and saliva specimens of patients after oral administration of lithium carbonate (3 x 300 mg) Jadran, Galen Laboratory Rijeka. Saliva and blood were taken 2 and 12 hours after the last dose. At the same time lithium ions at samples of blood and saliva were determined with both methods which showed high level of correlation. The mean difference of lithium ions between saliva and serum was statistically significant for p<0.05 using t student test. At saliva we got constant of elimination Kel = 0.02(-1)h and elimination half life (t(1/2)) was t(1/2)=34.6 h. For serum was t(1/2)= 24 h what means that lithium ions elimination is slower from saliva then from serum. That is the reason why probably concentration at saliva is higher then at serum. Lithium elimination is two compartment pharmacokinetic model where important part of compartment are saliva and salivary glands. At a certain point in medical treatment it could be expected to use controlled determination of lithium ions in saliva with serum as control.

Comparison of Methods for Determining Sodium in Fertilizers

1981 ◽  
Vol 64 (3) ◽  
pp. 704-708
Author(s):  
Luis F Corominas ◽  
Víctor M Boy ◽  
Pedro Rojas
Keyword(s):  
Phosphate Rock ◽  
Collaborative Study ◽  
Ammonium Oxalate ◽  
Selective Electrode ◽  
Accuracy And Precision ◽  
Flame Emission ◽  
Aoac Method ◽  
Aoac Official ◽  
Aas Method

Abstract The AOAC official first action method, 2.147-2.150, for flame emission spectrophotometry (FES) determination of sodium in fertilizers was compared with the atomic absorption spectrophotometric (AAS) method and the sodium selective electrode (SSE) method. Ammonium oxalate, which was previously compared with water, H2SO4, HC1, and HNO3, was used to extract the sample for all 3 methods. Three synthetic NPK samples, 3 commercial samples (urea, normal superphosphate, and neutrophos), 1 phosphate rock, and 2 Magruder check samples were used for the study. Statistically significant differences were obtained in averages for most of the samples, but few differences were found in standard deviations. The AAS method showed the best accuracy and precision. Accuracy of the AOAC method is acceptable. The SSE method showed the highest deviations from the theoretical values. A collaborative study is recommended to compare the AOAC with the AAS method.

scholarly journals Determination of copper in sugarcane spirit by flame atomic absorption spectrometry using a ternary solvent mixture (water-ethanol-acetone)

2017 ◽  
Vol 42 (1) ◽  
pp. 33 ◽  
Author(s):  
João Carlos De Souza ◽  
Aline Theodoro Toci ◽  
Maísa Azevedo Beluomini ◽  
Sebastião De Paula Eiras
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Reference Method ◽  
Absorption Spectrometry ◽  
Solvent System ◽  
Solvent Ratio ◽  
Flame Atomic Absorption ◽  
Determination Of Copper

The present work describes the use of a homogeneous ternary mixture of the solvents water, ethanol, and acetone to improve the determination of copper in sugarcane spirit by flame atomic absorption spectrometry. The solvent ratio used (on a volume basis) was 5.0:5.0:15.0 (water:ethanol:acetone). The analytical curve for copper was linear up to a concentration of 6.00 mg L-1 of copper, and could be described by the equation: Δabs = 0.1778CCu + 0.0048 (r2 = 0.9999), and limits of detection and quantification (calculated using the standard deviation of the blank) were 0.01 and 0.05 mg L-1 of copper, respectively. Use of the proposed homogeneous ternary solvent system provided good stability and a significant increase in sensitivity compared to reference methodology. This increase in sensitivity enables the detection of smaller quantities of copper in sugarcane spirit. The method was applied to determine copper in commercial brands of sugarcane spirits. The results obtained by the proposed method were favorably compared with those given by the reference method. 

Preliminary Comparison of Methods for Determining Sodium in Fertilizers

1980 ◽  
Vol 63 (3) ◽  
pp. 551-553
Author(s):  
Luis F Corominas ◽  
Victor M Boy ◽  
Manuel Guijosa
Keyword(s):  
Atomic Absorption ◽  
Experimental Work ◽  
Check Sample ◽  
Comparison Of Methods ◽  
Selective Electrode ◽  
Flame Emission ◽  
Aoac Method ◽  
Aoac Official ◽  
Aas Method

Abstract The AOAC official first action method 2.147–2.150 for the flame emission spectrophotometric (FES) determination of sodium in fertilizers was compared with the atomic absorption spectrophotometric (AAS) method and the sodium selective electrode (SSE) method. Two synthetic NPK samples, 3 commercial samples (urea, DAP, and superphosphate), 2 Magruder NPK check samples, and one Magruder muriate check sample were used for the study. Statistically significant differences were obtained in both averages and standard deviations for all samples. In general, the precision for all methods was acceptable; the AAS method seems to be the more accurate; the AOAC method needs to be revised; and the SSE method has the tendency to give higher values. Additional experimental work is necessary to define which method is the most convenient.

scholarly journals DETERMINATION OF HEAVY METALS ARSENIC AND CADMIUM IN THE REFILL DRINKING WATER IN PURWOKERTO

2020 ◽  
Vol 5 (1) ◽  
pp. 88
Author(s):  
Sri Royani ◽  
Adita Silvia Fitriana
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Absorption Spectrometry ◽  
Health Minister ◽  
Adverse Impacts ◽  
Drinking Water Production ◽  
Aas Method ◽  
The Republic ◽  
Drinking Water Samples

<p><em>Refill drinking water production is now rapidly increasing in several regions in Indonesia, including Purwokerto. According to the Regulation of Health Minister of the Republic of Indonesia (Permenkes) Number 492/Menkes/Per/IV/2010, heavy metal is one of the parameters of drinking water quality which has adverse impacts on human health. In this study, Arsenic (As) and Cadmium (Cd) would be studied. Atomic Absorption Spectrometry (AAS) Method was used to find As and Cd concentration in refill drinking water samples. The results showed that only one sample containing As from five samples was collected, but there is being safe for drinking according to Regulation of Health Minister of the Republic of Indonesia (Permenkes) Number 492/Menkes/Per/IV/2010. Meanwhile, Cd was not detected in samples. It can be concluded that refill drinking water samples that were taken from several depots in Purwokerto City are being safe for drinking.</em></p>

scholarly journals Determination of Lithium in Human Serum by Electrothermal Atomic Absorption Spectrometry

2000 ◽  
Vol 83 (2) ◽  
pp. 377-381 ◽  
Author(s):  
Sara González ◽  
Miguel Navarro ◽  
Herminia López ◽  
María C López ◽  
Vidal Pérez
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Human Subjects ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Lithium Carbonate ◽  
Graphite Tube ◽  
Serum Samples ◽  
Triton X

Abstract An efficient method was developed for the determination of nanogram levels of lithium in biological samples. Serum samples from human subjects from southeastern Spain, treated or not treated with lithium carbonate, were analyzed by electrothermal atomic absorption spectrometry. The samples were previously treated with a matrix modifier consisting of 0.1%Triton X-100 and injected through a graphite tube with L'vov platform. The Li concentrations measured by the procedure described for the 3 certified reference samples used were not significantly different (p &gt; 0.05) than certified levels. Sample recoveries and variability during several days, with coefficients of variation from 4.00 to 14.8%, demonstrated the reliability and accuracy of this technique. Mean Li concentration determined in the serum of individuals with psychiatric disorders treated with Li (n = 117, 5.077 ± 1.795 μg Li/mL) was significantly higher (p &lt; 0.001) than that in individuals not treated with Li (n = 24, 1.902 ± 2.054 ng Li/mL).

Determination of Sodium in Alkali-Treated Cereal Straws, Lye-Peel Wastes, and Brine-Frozen Foods with an Ion Selective Electrode Compared with Atomic Absorption Spectrometry

1976 ◽  
Vol 59 (4) ◽  
pp. 761-765 ◽  
Author(s):  
Geraldine E Secor ◽  
Gary M McDonald ◽  
Rolland M McCready
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Rice Straw ◽  
Simple Procedure ◽  
Absorption Spectrometry ◽  
Sodium Ion ◽  
Ion Selective Electrode ◽  
Frozen Foods ◽  
Selective Electrode

Abstract A simple procedure is described for determining sodium in sodium hydroxide-treated rice straw and rye grass, lye-peeled potato wastes, and brine-frozen vegetables. Samples containing ≤4% sodium were extracted with 0.05M ammonium carbonate and the extracts were analyzed directly by using a sodium ion selective electrode over the range 10−4 to 10−2M sodium ion. Comparable analyses of the same extracts by atomic absorption spectrometry agreed to within 10%. Recovery of sodium added to control rice straw was 102%.

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