Iodine speciation in coastal and inland bathing waters and seaweeds extracts using a sequential injection standard addition flow-batch method

Talanta ◽  
2015 ◽  
Vol 133 ◽  
pp. 7-14 ◽  
Author(s):  
Inês C. Santos ◽  
Raquel B.R. Mesquita ◽  
Adriano A. Bordalo ◽  
António O.S.S. Rangel
Keyword(s):  
Standard Addition ◽  
Sequential Injection ◽  
Batch Method ◽  
Bathing Waters ◽  
Iodine Speciation

Seasonal monitoring of inland bathing waters using a sequential injection method as a fast and effective tool for nutrient quantification (N : P)

2016 ◽  
Vol 8 (9) ◽  
pp. 1973-1980 ◽  
Author(s):  
Raquel B. R. Mesquita ◽  
Ana Machado ◽  
Inês C. Santos ◽  
Adriano A. Bordalo ◽  
António O. S. S. Rangel
Keyword(s):  
Sequential Injection ◽  
Nitrogen Base ◽  
Injection Method ◽  
Flow Method ◽  
Bathing Waters ◽  
Seasonal Monitoring ◽  
Major Nutrients

In this work, an expedite flow method for the combined determination of major nutrients, nitrogen base ions (nitrate, nitrite and ammonium) and phosphate, is described for seasonal monitoring of inland bathing waters.

scholarly journals Determination of Albumin, Glucose, and Creatinine Employing a Single Sequential Injection Lab-at-Valve with Mono-Segmented Flow System Enabling In-Line Dilution, In-Line Single-Standard Calibration, and In-Line Standard Addition

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1666 ◽  
Author(s):  
Kanokwan Kiwfo ◽  
Wasin Wongwilai ◽  
Tadao Sakai ◽  
Norio Teshima ◽  
Kate Grudpan
Keyword(s):  
Enzymatic Reaction ◽  
Standard Addition ◽  
Cost Effective ◽  
Sequential Injection ◽  
Slow Reaction ◽  
Preparation Step ◽  
Standard Calibration ◽  
Single Standard ◽  
Line Standard

A mono-segmented sequential injection lab-at-valve (SI-LAV) system for the determination of albumin, glucose, and creatinine, three key biomarkers in diabetes screening and diagnosis, was developed as a single system for multi-analyte analysis. The mono-segmentation technique was employed for in-line dilution, in-line single-standard calibration, and in-line standard addition. This made adjustments to the sample preparation step easy unlike the batch-wise method. The results showed that the system could be used for both fast reaction (albumin) and slow reaction (glucose with enzymatic reaction and creatinine). In the case of slow reaction, the analysis time could be shortened by using the reaction rate obtained with the SI-LAV system. This proposed system is for cost-effective and downscaling analysis, which would be applicable for small hospitals and clinics in remote places with a small number of samples but relatively fast screening would be needed.

Microbiological Assay of Streptomycin in Feeds

1969 ◽  
Vol 52 (4) ◽  
pp. 679-681
Author(s):  
John J Mayernik
Keyword(s):  
Standard Addition ◽  
Separation Method ◽  
Microbiological Assay ◽  
Batch Method ◽  
Low Level ◽  
Column Method ◽  
Compensation Methods ◽  
Microbial Assay ◽  
Resin Separation

Abstract Studies of the microbial assay of streptomycin were conducted to evaluate (1) four methods of preparing compensating standard curves and (2) a n IRC-50 resin separation method to overcome the interference of feed components in low level feeds. Compensating curves were prepared from extracts of blank feed, from extracts of feed in which streptomycin was adsorbed by IRC-50 in a batch method and also in a column method, and from extracts of feed by the method of standard addition. Recoveries of streptomycin using the extract of blank feed and extract of feed by the method of standard addition were promising (83–96%), whereas recoveries using IRC-50 resin-inactivated extract were low (47–62%). The IRC-50 resin separation method was found to be satisfactory in principle, but the interference of the feed components was not resolved. Further studies are planned on the compensation methods and the resin separation method.

Sequential injection standard addition for on-line measurement of mercury in the river Elbe

2001 ◽  
Vol 438 (1-2) ◽  
pp. 251-258 ◽  
Author(s):  
Olaf Elsholz ◽  
Carsten Frank ◽  
Burkhard Stachel ◽  
Heinrich Reincke ◽  
Ralf Ebinghaus
Keyword(s):  
Standard Addition ◽  
Sequential Injection ◽  
Line Measurement ◽  
River Elbe ◽  
On Line

Sequential injection system exploring the standard addition method for phosphate determination in high salinity samples: interstitial, transitional and coastal waters

2012 ◽  
Vol 4 (5) ◽  
pp. 1452 ◽  
Author(s):  
Raquel Beatriz Ribeiro Mesquita ◽  
Inês Carvalho Santos ◽  
Adriano Agostinho Bordalo ◽  
António Osmaro Santos Silva Rangel
Keyword(s):  
Coastal Waters ◽  
High Salinity ◽  
Standard Addition ◽  
Standard Addition Method ◽  
Injection System ◽  
Sequential Injection ◽  
Addition Method

Sequential injection methodology for carbon speciation in bathing waters

2013 ◽  
Vol 778 ◽  
pp. 38-47 ◽  
Author(s):  
Inês C. Santos ◽  
Raquel B.R. Mesquita ◽  
Ana Machado ◽  
Adriano A. Bordalo ◽  
António O.S.S. Rangel
Keyword(s):  
Sequential Injection ◽  
Bathing Waters

Sequential Injection Chromatography with Monolithic Column for Phenothiazines Assay in Human Urine and Pharmaceutical Formulations

2020 ◽  
Vol 16 (7) ◽  
pp. 967-975
Author(s):  
Abubakr M. Idris
Keyword(s):  
Phase Composition ◽  
Human Urine ◽  
Mobile Phase ◽  
Monolithic Column ◽  
Pharmaceutical Formulations ◽  
Pharmaceutical Formulation ◽  
Assay Method ◽  
Sequential Injection ◽  
Mobile Phase Composition ◽  
Sequential Injection Chromatography

Methods: Sequential injection chromatography (SIC) with monolithic column has been proposed with potential benefits for separation and quantification. Objective: To utilize SIC to develop a new assay method for the separation and quantification of some phenothiazines (promethazine, chlorpromazine and perphenazine) in human urine and synthetic pharmaceutical formulations. Methods: The 32 full-factorial design was adopted to study the effect of mobile phase composition on separation efficiency, retention time, peak height and baseline. The separation was conducted on a C18 monolithic column (100 × 4.6 mm) using a mobile phase composition of phosphate: acetonitrile:methanol (60:28:12) at pH 4.0. The detection was carried out using a miniaturized fiber optic spectrometer at 250 nm. Results: Satisfactory analytical features, including number of theoretical plates (1809-6232), peak symmetry (1.0-1.3), recovery (95.5-99.1% in pharmaceutical formulations and 91.6-94.7% in urine), intra-day precision (0.36-1.60% for pharmaceutical formulation and 2.96-3.67 for urine), inter-day precision (1.47-2.28% for pharmaceutical formulation), limits of detection (0.23-0.88 μg/ml) and limits of quantification (0.77-2.90 μg/ml), were obtained. Conclusion: The remarkable advantages of the proposed SIC method are the inexpensiveness in terms of instrumentation and reagent consumption.

Sequential Injection Analysis of Fe(II) in Supplement Samples Using Silver Nanoclusters as Optical Sensor

2016 ◽  
Vol 12 (6) ◽  
pp. 612-619
Author(s):  
Dittapong Pairoh ◽  
Kanokwan Chaiendoo ◽  
Wittaya Ngeontae ◽  
Rodjana Burakham
Keyword(s):  
Optical Sensor ◽  
Silver Nanoclusters ◽  
Sequential Injection Analysis ◽  
Sequential Injection
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