Determination of Ten Trace Element in River Deposit by ICP-OES

2013 ◽  
Vol 807-809 ◽  
pp. 196-199
Author(s):  
Ting Ting Liu ◽  
Hong Yuan Shen
Keyword(s):  
Trace Element ◽  
Standard Addition ◽  
Measured Data ◽  
Good Precision ◽  
Icp Oes ◽  
Digestion Method ◽  
Wet Digestion ◽  
Relative Standard ◽  
Precision And Accuracy

Wet digestion method had been used in river deposit of BZ profile. At the same time, Mn, Cu, Ba, Ni, Pb, Zn, Rb, V, Sr and Zr in river deposit were determined by ICP-OES. The results show that the relative standard deviations are all below 0.39%, while the recovery of standard addition is 94.3%~117.1%. The method is proved to have good precision and accuracy, and to be simple and rapid. And the measured data provide basis for paleoflood study in this area.

scholarly journals H-point Standard Addition Method for the Simultaneous Spectrophotometric Determination of Captopril and Hydrochlorothiazide in Pharmaceutical Formulations

2021 ◽  
pp. 77-85
Keyword(s):  
Spectrophotometric Determination ◽  
Standard Addition ◽  
Pharmaceutical Formulations ◽  
Standard Addition Method ◽  
Addition Method ◽  
Real Samples ◽  
Relative Standard ◽  
Recovery Percentage ◽  
Precision And Accuracy

Simultaneous spectrophotometric determination of captopril and hydro-chlorothiazide in pharmaceutical formulations by the H-point standard addition method (HPSAM) is described. Absorbance at 211.5 and 230.3 nm was monitored upon the addition of standard solutions of captopril. The results showed that in prepared mixtures, captopril and hydrochlorothiazide can be determined simultaneously at concentration ratios varying from 1.0:0.8 to 2.5:1.5 μg/mL, respectively. Percentage recovery was found to be 95.33–104.37% for captopril and 96.8–105% for hydrochlorothiazide, with a relative standard deviation (RSD) of 2.46%. The method was successfully used to evaluate the antihypertensive captopril drug in a binary combination of hydrochlorothiazide in real samples with high precision and accuracy within the recovery percentage.

Evaluation of ICP-OES Method for Heavy Metal and Metalloids Determination in Sterile Dump Material

2018 ◽  
Vol 273 ◽  
pp. 159-166 ◽  
Author(s):  
Darya Ilieva ◽  
Andriana Surleva ◽  
Manuela Murariu ◽  
Gabi Drochioiu ◽  
Mohd Mustafa Al Bakri Abdullah
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Digestion Method ◽  
Inductively Coupled ◽  
Wet Digestion ◽  
Accuracy And Precision ◽  
Plasma Optical Emission Spectrometry

This study is aimed at development of an analytical method for the determination of heavy metals and arsenicin waste material from barite recovery by dual view inductively coupled plasma optical emission spectrometry (ICP-OES) after wet digestion. Aquaregia open digestion method was used for sample preparation. A soil certified reference material was used to study the efficiency of wet digestion procedure applied to sterile dump material. The sensitivity, accuracy, and precision of the method were determined. The achieved detection limits are: Arsenic (As) 0.80; Copper (Cu) 0.29; Lead (Pb) 0.29; Zink (Zn) 0.30; Cadmium (Cd) 0.11; Chromium (Cr) 0.09; Nickel (Ni) 0.02, mg.kg-1.The developed method is applied for the determination of hazardous metals and arsenic in sterile dump material from closed barite mine in the region of Tarnita-Suceava, Romania.

Determination of Epsilon Aminocaproic Acid Based on Charge Transfer Complexation with p-Nitrophenlol by Spectrophotometry

2020 ◽  
Vol 16 ◽  
Author(s):  
Sheng-Yun Li ◽  
Fang Tian
Keyword(s):  
Charge Transfer ◽  
Aminocaproic Acid ◽  
Concentration Limit ◽  
Official Method ◽  
Good Precision ◽  
Pharmaceutical Dosage Forms ◽  
Relative Standard ◽  
A Charge ◽  
Epsilon Aminocaproic Acid

: A spectrophotometry was investigated for the determination of epsilon aminocaproic acid (EACA) with p-nitrophenol (PNP). The method was based on a charge transfer (CT) complexation of this drug as n-electron donor with π-acceptor PNP. Experiment indicated that the CT complexation was carried out at room temperature for 10 minutes in dimethyl sulfoxide solvent. The spectrum obtained for EACA/PNP system showed the maximum absorption band at wavelength of 425 nm. The stoichiometry of the CT complex was found to be 1:1 ratio by Job’s method between the donor and the acceptor. Different variables affecting the complexation were carefully studied and optimized. At the optimum reaction conditions, Beer’s law was obeyed in a concentration limit of 1～6 µg mL-1. The relative standard deviation was less than 2.9%. The apparent molar absoptivity was determined to be 1.86×104 L mol-1cm-1 at 425 nm. The CT complexation was also confirmed by both FTIR and 1H NMR measurements. The thermodynamic properties and reaction mechanism of the CT complexation have been discussed. The developed method could be applied successfully for the determination of the studied compound in its pharmaceutical dosage forms with a good precision and accuracy compared to official method as revealed by t- and F-tests.

Collaborative Study of the Gas-Liquid Chromatographic Method for Determination of Stereochemical Composition of Amphetamine

1972 ◽  
Vol 55 (1) ◽  
pp. 146-148
Author(s):  
Clyde E Wells
Keyword(s):  
Column Chromatography ◽  
Chromatographic Method ◽  
Collaborative Study ◽  
Good Precision ◽  
Liquid Chromatographic Method ◽  
Precision And Accuracy ◽  
Standard Deviations ◽  
Liquid Chromatographic ◽  
Amphetamine Sulfate

Abstract Eight laboratories collaboratively studied a method for the quantitative GLC determination of d- and l-amphetamine in tablets. The drugs are separated from tablet excipients by column chromatography and reacted with Ntrifluoroacetyl-( 0-prolyl chloride, and the resulting derivatives are analyzed by GLC. The samples consisted of commercial d-amphetamine sulfate tablets (with and without butabarbital), dl-amphetamine sulfate tablets, and a mixed d- and l-amphetamine sulfate standard. Recoveries were acceptable, and the standard deviations never exceeded 0.64%. The results demonstrate that the method gives good precision and accuracy, and the method is recommended for adoption as official first action.

scholarly journals Determination of Platinum in Wine by Graphite Furnace Atomic Absorption Spectrometry

1997 ◽  
Vol 80 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Carmen Cabrera-Vique ◽  
Pierra-Louis Teissedre ◽  
Marie-Thérèse Cabanis ◽  
Jean-Claude Cabanis
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Standard Addition ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
White Wines ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

Abstract A method based on graphite furnace atomic absorption spectrometry (GFAAS) was developed for determining platinum in wine. Wine samples were prepared by microwave acid digestion or dry mineralization. The method of standard addition was used for Pt determination in untreated wine samples and mineralized samples. Analyte modifiers and furnace conditions were optimized. Effects of cations (Mg2+, Ca2+, K+, Na+, and NH|) and anions (PO43, SO42) were tested separately and in combination. Analytical characteristics of the method were optimized for analyte recovery and signal enhancement. Recoveries ranged from 92.5 to 102%, and precision reproducibility relative standard deviation varied from 7.5 to 10%. Red, rosé, and white wines from France were analyzed. Platinum levels found in most wines were very low (<10 μg/L).

Determination of Mercury in Food Products and Biological Fluids by Aeration and Flameless Atomic Absorption Spectrophotometry

1971 ◽  
Vol 54 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Virginia A Thorpe
Keyword(s):  
Atomic Absorption ◽  
Biological Fluids ◽  
Food Products ◽  
Atomic Absorption Spectrophotometry ◽  
Good Precision ◽  
Flameless Atomic Absorption ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Mercury In Fish

Abstract This paper describes a simple, rapid modification of a method developed at the Fisheries Research Board of Canada for determining mercury in fish and other food products. Wet digestion and flameless techniques of atomic absorption spectrophotometry are used. Replicate analyses on different days showed good precision and samples spiked with known amounts of mercury showed adequate recovery.

scholarly journals Determination of the Levels of Heavy Metals and Formaldehyde in Baby Clothes in South Africa: A Case Study of Stores in the Greater Cape Town Region

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
P. Nyamukamba ◽  
C. Bantom ◽  
Z. Mququ ◽  
T. Ngcobo ◽  
S. Isaacs
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Formaldehyde Concentration ◽  
Inductively Coupled ◽  
Wet Digestion ◽  
Skin Contact ◽  
Relative Standard ◽  
Artificial Sweat

Herein, we report on the determination of formaldehyde, pH, and heavy metals (Pb, As, Co, Cr, Ni, and Cd) in various baby apparel (cotton, polyester, nylon, elastane, and polyethylene) of different colours (light, medium, and dark) purchased from both high-end and low-end market stores. The concentrations of the heavy metals were determined by inductively coupled plasma (ICP) after wet digestion and also after extraction using artificial sweat for a selected range of skin-contact baby apparel. The relative standard deviation for the determination of all heavy metals was less than 5% except for nickel which was 10.49%. The concentrations of the heavy metals in wet digested samples were found to be in the following range: Pb (0.02–23.662 mg/kg), As (0.009–0.033 mg/kg), Co (0.001–1.053 mg/kg), Cr (0.053–6.373 mg/kg), Ni (0.039–36.715 mg/kg), and Cd (0.001–0.914 mg/kg), whereas the concentrations in artificial sweat extracted samples were in the following range: Pb (0.006–1.658 mg/kg), As (not detected), Co (0.001–1.05 mg/kg), Cr (0.112–0.371 mg/kg), Ni (0.062–0.121 mg/kg), and Cd (0.001–0.018 mg/kg). The highest concentrations of Pb, Cr, and Co after wet digestion were found in baby apparel purchased from low-end market stores, whereas for As, Ni, and Cd were from high-end market stores. All the samples had a formaldehyde concentration within the acceptable limits recommended by Oeko-Tex. Out of the thirty-four samples analysed, fifteen samples were found to have a pH higher than Oeko-Tex limits. The pH values for the samples that exceeded the Oeko-Tex limits were in the alkali region, and the highest was 11.31 which exceeded by 3.81.

Wet Oxidation Method for the Determination of Submicrogram Quantities of Mercury in Cereal Grains

1972 ◽  
Vol 55 (5) ◽  
pp. 951-959 ◽  
Author(s):  
M Malaiyandi ◽  
J P Barrette
Keyword(s):  
Vanadium Pentoxide ◽  
Cereal Grains ◽  
Acid Mixture ◽  
Wet Oxidation ◽  
Digestion Method ◽  
Oxidation Method ◽  
Digestion Procedure ◽  
Wet Digestion ◽  
Cereal Flour

Abstract A simple and rapid wet-digestion procedure is described in which flour samples containing bound and unbound mercury are decomposed, using a sulfuric-nitric acid mixture in the presence of small amounts of vanadium pentoxide. Fortification studies with 3 organomercuric compounds on mixed cereal flour indicate average recoveries in excess of 96% in the 20–500 ppb range. This wet digestion method is compared with the Klein procedure to illustrate the advantages and significance of the vanadium pentoxide oxidation.

Adaptation of a Dry Ashing Procedure for Determination of Selenium by Fluorimetry in High-Fat Foods

1995 ◽  
Vol 78 (2) ◽  
pp. 477-479 ◽  
Author(s):  
Jacques R Bellanger
Keyword(s):  
Magnesium Nitrate ◽  
High Fat ◽  
Fluorimetric Determination ◽  
Digestion Method ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Selenium Determination ◽  
Wet Ashing ◽  
Total Procedure

Abstract The wet ashing–dry ashing procedure for destruction of organic matter in high-fat foods for subsequent fluorimetric determination of selenium was investigated. Samples were decomposed by predigestion with nitric acid and dry-ashed with magnesium nitrate and hydrochloric acid. Selenium was recovered quantitatively through the total procedure. Detection limit was about 4 ppb. Accuracy was tested by analysis of several reference materials and by comparison with the wet-digestion method. The present method can be used conveniently for selenium determination in high-fat foods.

Sign in / Sign up

Export Citation Format

Share Document