Determination of Fluoride in Antarctic Krill Euphausia superba Using Ion Chromatography

2013 ◽  
Vol 842 ◽  
pp. 210-215
Author(s):  
Xiao Sheng Shen ◽  
Hai Yan Zhang ◽  
Yan Lin Li ◽  
You Qiong Cai
Keyword(s):  
Hydrochloric Acid ◽  
Ion Chromatography ◽  
Antarctic Krill ◽  
Limit Of Detection ◽  
Euphausia Superba ◽  
Accurate Method ◽  
Acid Extraction ◽  
Key Words Fluoride ◽  
Optimum Extraction

A simple, rapid and accurate method for the determination of fluoride in Antarctic krill has been developed. The fluoride content in Antarctic krill was determined by ion chromatography. The method requires a simple sample clean-up procedure to remove the interfering Cl- from the hydrochloric acid extraction solution. The optimum extraction conditions of fluoride from Antarctic krill samples were obtained by adding 8mL of 1:11(v/v) hydrochloric acid solution and extracting for 60 min. Under these conditions, recoveries of fluoride from Euphausia superba and Penaeus vannamei were 97.9-105.6% and 95.1-101.9%, respectively. The limit of detection was 0.01mg/kg. The method was applied to the determination of fluoride in Antarctic krill. Key words: Fluoride, Antarctic krill, Ion chromatography

scholarly journals Derivatization Ion Chromatography for the Determination of Monoethanolamine in Presence of Hydrazine in PHWR Steam-Water Circuits

2011 ◽  
Vol 2011 ◽  
pp. 1-5
Author(s):  
Ayushi D. ◽  
Arijit Sengupta ◽  
Sangita D. Kumar ◽  
A. G. Kumbhar ◽  
G. Venkateswaran
Keyword(s):  
Ion Chromatography ◽  
Mobile Phase ◽  
Limit Of Detection ◽  
Accurate Method ◽  
Feed Water ◽  
Relative Standard ◽  
Conductometric Detection ◽  
Mode A ◽  
Eluent Acetone

A simple, rapid and accurate method for the determination of monoethanolamine (MEA) in PHWR steam-water circuits has been developed. MEA is added in the feed water to provide protection against corrosion while hydrazine is added to scavenge dissolved oxygen. The quantitative determination of MEA in presence of hydrazine was accomplished using derivatization ion chromatography with conductometric detection in nonsuppressed mode. A Metrosep cation 1-2 analytical column and a Metrosep cartridge were used for cation separation. A mixture of 4 mM tartaric acid, 20% acetone and 0.05 mM HNO3was used as eluent. Acetone in the mobile phase leads to the formation of different derivatives with MEA and hydrazine. The interferences due Na+and NH4 +were eliminated by adopting a simple pretreatment procedure employing OnGuard-H cartridge. The limit of detection limit of MEA was 0.1 μg mL−1and the relative standard deviation was 2% for the overall method. The recovery of MEA added was in the range 95%–102%. The method was applied to the determination of MEA in steam generator water samples.

scholarly journals Determination of cyanide in bamboo shoots by microdiffusion combined with ion chromatography–pulsed amperometric detection

2018 ◽  
Vol 5 (4) ◽  
pp. 172128 ◽  
Author(s):  
Ming Ding ◽  
Kailiang Wang
Keyword(s):  
Ion Chromatography ◽  
Limit Of Detection ◽  
Correlation Coefficients ◽  
Amperometric Detection ◽  
High Sensitivity ◽  
Practical Method ◽  
Pulsed Amperometric Detection ◽  
Bamboo Shoots ◽  
Relative Standard

A practical method for the determination of cyanide in bamboo shoots has been developed using microdiffusion preparation integrated with ion chromatography–pulsed amperometric detection (IC-PAD). Cyanide was released from bamboo shoots after Conway cell microdiffusion, and then analysed by IC-PAD. In comparison with the previously reported methods, derivatization and ion-pairing agent addition were not required in this proposed microdiffusion combined with IC-PAD method. The microdiffusion parameters were optimized including hydrolysis systems, temperature, time, and so on. Under the optimum conditions, the linear range of the calibration curve for cyanide was 0.2–200.0 µg kg −1 with satisfactory correlation coefficients of 0.9996 and the limit of detection was 0.2 µg kg −1 ( S/N  = 3). The spiked recovery range was from 92.8 to 98.6%. The intra-day and inter-day relative standard deviations of cyanide were 2.7–14.9% and 3.0–18.3%, respectively. This method was proved to be convenient in operation with high sensitivity, precision and accuracy, and was successfully applied in the determination of cyanide in bamboo shoot samples.

scholarly journals Determinación de F-, CL-, NO3- y SO42- en muestras de agua, por cromatografía iónica y métodos tradicionales

2017 ◽  
Vol 2 (2) ◽  
pp. 39
Author(s):  
Danis Pirela ◽  
Gleidy Vivas ◽  
Ligbel Sánchez ◽  
Hendrik Avila
Keyword(s):  
Ion Chromatography ◽  
Limit Of Detection ◽  
Comparison Of Methods ◽  
Chromatography Method ◽  
Sulfate Ions ◽  
Palabras Clave ◽  
Relative Standard ◽  
Scientific Technical ◽  
Chloride Sulfate

RESUMEN El análisis químico debe generar resultados correctos y confiables, siendo importante la validación del método para la realización de servicios científicos técnicos, con calidad de los resultados. Se determinó la concentración de los F-, Cl-, NO3- y SO42- por métodos tradicionales y cromatografía iónica. Se evaluó la precisión en término de repetibilidad y la exactitud en porcentaje de recuperación utilizando patrones certificados. Se obtuvieron desviaciones estándar relativas en un intervalo de 0,70 a 4% y porcentajes de recuperación entre 98 y 99% para el análisis por cromatografía iónica. El límite de detección para el método de cromatografía iónica se encontró entre 0,005 y 0,1391 mg/L y mostró una linealidad de 0,999. Los resultados demuestran que el método de cromatografía iónica es más sensible y rápido al ser comparado con los métodos tradicionales, con comportamientos similares para la determinación de los iones de fluoruro y sulfato, pero diferentes en la determinación de los iones de cloruro y nitrato. Palabras clave: Cromatografía iónica, fluoruro, cloruro, sulfato, nitrato, comparación de métodos. ABSTRACT Chemical analysis must generate correct and reliable results, method validation for scientific-technical services with quality results, to be important. Comparing the results obtained by traditional methods and ion chromatography in the determination of F-, Cl-, NO3- and SO42-- was conducted. Was evaluated in terms of repeatability precision and for accuracy tests of recovery using certified patterns were carried out. Relative standard deviations in a range from 0.70 to 4% and recovery rates between 98 and 99% for analysis by ion chromatography were. The limit of detection for ion chromatography method was found between 0.005 and 0.1391 mg/L and showed a linearity of 0.999. The results show that the ion chromatography method is more sensitive and faster when compared with the methods traditional, with similar behaviors for the determination of fluoride and sulfate ions, but different in the determination of the chloride and nitrate ions. Key words: Ion chromatography, fluoride, chloride, sulfate, nitrate, comparison of methods

scholarly journals Improvement of a 'SSQuEE' Method for Recovery and Preconcentration of Pesticides from Environmental Samples

2021 ◽  
Vol 33 (10) ◽  
pp. 2472-2476
Author(s):  
Rajib Joarder
Keyword(s):  
Cloud Point ◽  
High Performance ◽  
Limit Of Detection ◽  
Ionic Surfactant ◽  
Analytical Technique ◽  
Liquid Chromatography Separation ◽  
Cloud Point Temperature ◽  
Triton X ◽  
Optimum Extraction

A simple, sensitive, quick, easy and efficient (SSQuEE) analytical technique based on cloud point extraction (CPE) has been developed for the determination of different pesticides present in soil and water with high performance liquid chromatography separation and ultraviolet detection. The environmentally friendliness surfactant like Triton X -100, compared to Tween series of non-ionic surfactant can effectively extract imidacloprid (insecticide), flusilazole (fungicide) and atrazine (herbicide) at cloud point temperature at 67 ºC, 82 ºC and 62 ºC, respectively. To reach the optimum extraction efficiency, different experimental parameters like surfactant concentration, salt type and its concentration, equilibrium time and temperature, pH were observed. At the optimum conditions, linear regression coefficient of the standard curves was greater than 0.9924. The limit of detection of imidacloprid, flusilazole and atrazine were 0.10 μg L-1, 0.24 μg L-1, 0.15 μg L-1 and recovery percent are 99.71 %, 88.1% and 89.74%, respectively.

scholarly journals Determination of Biogenic Amines in Cheese

1997 ◽  
Vol 80 (5) ◽  
pp. 1006-1012 ◽  
Author(s):  
Silvana R Vale ◽  
M Beatriz A Glória
Keyword(s):  
Hydrochloric Acid ◽  
Biogenic Amines ◽  
Reversed Phase ◽  
Fluorometric Detection ◽  
Acid Extraction ◽  
Ion Pair Chromatography ◽  
Liquid Chromatographic ◽  
Postcolumn Derivatization ◽  
Ml Detection

Abstract A liquid chromatographic (LC) procedure for determining 10 biogenic amines in cheese is described. The method is based on ion-pair chromatography on a reversed-phase column with postcolumn derivatization with o-phthaldialdehyde and fluorometric detection. It allowed simultaneous determination of 10 amines in <80 min: histamine, tyramine, tryptamine, 2-phenylethylamine, serotonin, agmatine,spermine, spermidine, putrescine, and cadaverine. Linearity for each amine was observed between 0.5 and 6.0 μg/mL. Detection limits ranged from 0.004 to 0.009 μg/20 μL, and determination limits ranged from 0.066 to 0.149 mg/100 g. Amino acids and other amines did not interfere with determination of biogenic amines. Three extractantsmethanol, hydrochloric acid, and trichloroacetic acidwere compared in their efficiency to recover aminesfrom spiked samples. Purification of the cheese extract was required prior to LC to avoid interference from compounds in the cheese matrix. Hydrochloric acid extraction followed by purification with diethyl ether gave best recoveries for all the amines (75.5-112.3%). The method is simple, fast, and reliable. It can be used to study the technological and toxicological implications of biogenic amines in cheeses.

scholarly journals Validation of band counts in eyestalks for the determination of age of Antarctic krill, Euphausia superba

PLoS ONE ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. e0171773 ◽  
Author(s):  
Raouf Kilada ◽  
Christian S. Reiss ◽  
So Kawaguchi ◽  
Robert A. King ◽  
Tsuyoshi Matsuda ◽  
...  
Keyword(s):  
Antarctic Krill ◽  
Euphausia Superba ◽  
Antarctic Krill Euphausia Superba
Sign in / Sign up

Export Citation Format

Share Document