Exploring the Determination of Struvite Solubility Product from Analytical Results

2006 ◽  
Vol 27 (9) ◽  
pp. 951-961 ◽  
Author(s):  
M.S. Rahaman ◽  
D. S. Mavinic ◽  
M.I.H. Bhuiyan ◽  
F. A. Koch
Keyword(s):  
Solubility Product ◽  
Analytical Results

Spectrographic Analysis of Cast Iron Using Fused Buttons

1971 ◽  
Vol 25 (3) ◽  
pp. 342-344 ◽  
Author(s):  
John P. Cummings ◽  
Ronald H. Hall ◽  
Ronald J. Plenzler
Keyword(s):  
Weight Loss ◽  
Cast Iron ◽  
High Voltage ◽  
Analytical Method ◽  
White Cast Iron ◽  
Inert Atmosphere ◽  
Spectrographic Analysis ◽  
Analytical Results ◽  
Good Homogeneity

This paper presents an analytical method for the determination of minor metals in white cast iron fused buttons. This method enables the measurement of metals in cast iron with rapidity and excellent analytical results. Buttons of 40 g appear to be ideal but smaller button samples can be tolerated. The fused buttons have good homogeneity, very slight weight loss, and no significant change in composition. Metal cast spectrochemical samples are analyzed in an inert atmosphere utilizing a high voltage spark.

Determination of Cellular Mechanical Properties by Cell Poking, With an Application to Leukocytes

1990 ◽  
Vol 112 (3) ◽  
pp. 283-294 ◽  
Author(s):  
G. I. Zahalak ◽  
W. B. McConnaughey ◽  
E. L. Elson
Keyword(s):  
Mechanical Properties ◽  
Final Section ◽  
Mechanical Response ◽  
Living Cells ◽  
Micropipette Aspiration ◽  
Current Status ◽  
Technical Description ◽  
Analytical Results ◽  
Simple Models

In this paper we review the cell-poking technique as an approach for investigating the mechanical properties of living cells. We first summarize the rationale for the technique and the mainly qualitative results obtained so far. Then we provide a technical description of the instrument as it is configured at present. This is followed by a discussion of the current status of analytical results available for interpreting cell-poking measurements. In the final section we apply these results to an analysis of unmodulated and modulated lymphocytes and neutrophils, and conclude that the mechanical response of these leukocytes to indentation is not consistent with simple models developed by previous investigators on the basis of micropipette-aspiration experiments.

Solubility and Complex-Ion Equilibria

2021 ◽  
pp. 313-324
Author(s):  
Christopher O. Oriakhi
Keyword(s):  
Metal Complexes ◽  
Solubility Product ◽  
Formation Constants ◽  
Aqueous Systems ◽  
Complex Ions ◽  
Ionic Compounds ◽  
Molar Solubility ◽  
Solubility Product Constant ◽  
Complex Ion

Solubility and Complex-Ion Equilibria broadens the previous chapter’s coverage of equilibria to include aqueous systems containing two or more solutes of slightly soluble ionic compounds and the formation of metal complexes in solution. Solubility equilibria which allow quantitative predictions of how much of a compound will dissolve under given conditions are covered. The meaning of the solubility product constant (K sp) and how to calculate it from molar solubility values is presented. Also discussed is determination of molar solubility from K sp. Calculations demonstrate how to predict the formation of a precipitate by comparing the ion product or solubility quotient (Q) with K sp. Formation constants of complex ions and calculations involving complex ion equilibria are explained.

scholarly journals Evaluation of Results of an Interlaboratory Comparison Test on Determination of Acrylamide in Crispbread Samples

2005 ◽  
Vol 88 (5) ◽  
pp. 1413-1418 ◽  
Author(s):  
Thomas Wenzl ◽  
Elke Anklam
Keyword(s):  
Standard Deviation ◽  
Proficiency Test ◽  
Interlaboratory Comparison ◽  
Research Centre ◽  
Proficiency Tests ◽  
Joint Research ◽  
Joint Research Centre ◽  
Analytical Results ◽  
Directorate General

Abstract The European Commission's Directorate General Joint Research Centre has organized several proficiency tests on the determination of acrylamide (AA) in food. This paper presents the results and outcome of a proficiency test that focused on the determination of AA in crispbread samples. One of the goals was the identification of the influence of different parameters such as analyte extraction or instrument calibration on the analytical results. A set of samples, containing 3 different crispbread samples as well as extracts of one crispbread sample and AA standard solutions, was shipped to each participant. A total of 42 European laboratories reported analytical results that were evaluated by applying internationally accepted protocols and procedures. The study found that, for each sample, the results of 4–8 laboratories were outside the range formed by the target value plus or minus the 2-fold of the target standard deviation; thus, they did not perform satisfactorily. In transferring this knowledge to the data of monitoring databases of AA in food, care must be taken that data are quality controlled, as it is likely that some of them may be biased.

Automated multiple flow-injection analysis in clinical chemistry: determination of albumin with bromcresol green.

1980 ◽  
Vol 26 (2) ◽  
pp. 331-334 ◽  
Author(s):  
B W Renoe ◽  
K K Stewart ◽  
G R Beecher ◽  
M R Wills ◽  
J Savory
Keyword(s):  
Standard Deviation ◽  
Relative Standard Deviation ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Clinical Chemistry ◽  
Analytical Results ◽  
Relative Standard ◽  
Clinical Chemical ◽  
Bromcresol Green

Abstract We describe an adaptation of automated multiple flow-injection analysis instrumentation to an analysis for albumin in serum. The bromcresol green reaction was used to test the utility of the system. The approach yielded albumin results with excellent sensitivity, no measurable carryover, a relative standard deviation of less than 1%, good correlations with published procedures, and no measurable interferences. The simplicity and flexibility of the instrumentation and its performance integrity, as indicated by the analytical results, make this a viable clinical chemical tool.

Challenges in the Determination of Unsubstituted Food Folates: Impact of Stabilities and Conversions on Analytical Results

2015 ◽  
Vol 63 (9) ◽  
pp. 2367-2377 ◽  
Author(s):  
Hanna Sara Strandler ◽  
Johan Patring ◽  
Margaretha Jägerstad ◽  
Jelena Jastrebova
Keyword(s):  
Analytical Results

Overview: Quality Control of Tumor Marker Assays

1998 ◽  
Vol 13 (4) ◽  
pp. 238-240
Author(s):  
R. Kruse ◽  
W.-J. Geilenkeuser ◽  
G. Röhle
Keyword(s):  
Quality Control ◽  
Tumor Marker ◽  
Ca 125 ◽  
Analytical Results ◽  
Commercial Kit

Data from interlaboratory surveys for the determination of CA 125 (1987 to 1998) show large differences depending on the commercial kit used. Samples of the same material produced different analytical results in different interlaboratory surveys, thus showing that some kits did not have a satisfactory rate of reproducibility over a longer period of time.

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