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1. Why do we need the uncertainty factor?

Author:
Analytical Methods Committee AMCTB No. 88,
Source:
Analytical methods 2019 v.11 no.15 pp. 2105-2107
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; uncertainty; uncertainty analysis;     Show all 3 Subjects
Abstract:
... The uncertainty factor is a new way to express measurement uncertainty. It is especially applicable when the uncertainty is large (e.g., expanded relative uncertainty > 20%), which occurs in some analytical methods, and also when the uncertainty includes that arising from the primary sampling of highly heterogeneous materials. The upper and lower confidence limits of the uncertainty interval are c ...
DOI:
10.1039/c9ay90050k

2. The correlation between regression coefficients: combined significance testing for calibration and quantitation of bias

Author:
Analytical Methods Committee AMCTB No 87,
Source:
Analytical methods 2019 v.11 no.14 pp. 1845-1848
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; calibration; regression analysis;     Show all 3 Subjects
Abstract:
... In the analytical sciences regression methods have two main uses – in calibrations in instrumental analysis, and in testing for bias in method comparison studies. In first order (straight line) regression the true values of the intercept α and the slope β are independent of each other but their estimated values  and  are not independent. This can be appreciated visually by considering the straig ...
DOI:
10.1039/c9ay90041a

3. Revision of the International System of Units (Background paper)

Author:
Analytical Methods Committee AMCTB No 86,
Source:
Analytical methods 2019 v.11 no.12 pp. 1577-1579
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; analytical chemistry; metrology;     Show all 3 Subjects
Abstract:
... The International System of Units (SI) is the only globally agreed practical system of measurement units. Stemming from the Metre Convention of 1875, which established a permanent organisational structure for member governments to act in common accord on all matters relating to units of measurement, the SI was formalised in 1960 and defined by the ‘SI Brochure’. The foundation of the SI are the se ...
DOI:
10.1039/c9ay90028d

4. Nanoanalytics: history, concepts, and specificities

Author:
Faucher, Stéphane; Le Coustumer, Philippe; Lespes, Gaëtane
Source:
Environmental science and pollution research international 2019 v.26 no.6 pp. 5267-5281
ISSN:
0944-1344
Subject:
analytical methods,   etc   ; analytical chemistry; nanomaterials;     Show all 3 Subjects
Abstract:
... This article deals with analytical chemistry devoted to nano-objects. A short review presents nano-objects, their singularity in relation to their dimensions, genesis, and possible transformations. The term nano-object is then explained. Nano-object characterization activities are considered and a definition of nanoanalytics is proposed. Parameters and properties for describing nano-objects on an ...
DOI:
10.1007/s11356-018-1646-6

5. A novel fluorescent turn-on probe for imaging biothiols based on SNAr substitution-skeletal rearrangement strategy

Author:
Ren, Aishan; Zhu, Dongjian; Zhong, Xing; Xiong, Yuhao; Duan, Zhenhua
Source:
Analytical methods 2019 v.11 no.3 pp. 262-267
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; fluorescence; image analysis;     Show all 3 Subjects
Abstract:
... A novel fluorescent turn-on probe 2 not only exhibited dramatic fluorescence enhancement by quinoline-to-quinolinone transformation, but also showed high sensitivity in the order Cys > GSH > Hcy. Importantly, 2 was successfully applied for imaging of biothiols in living cells. ...
DOI:
10.1039/c8ay02413h

6. Green extraction techniques in green analytical chemistry

Author:
Armenta, Sergio; Garrigues, Salvador; Esteve-Turrillas, Francesc A.; de la Guardia, Miguel
Source:
Trends in analytical chemistry 2019 v.116 pp. 248-253
ISSN:
0165-9936
Subject:
analytical methods,   etc   ; analytical chemistry; energy; liquids; wastes;     Show all 5 Subjects
Abstract:
... Green analytical chemistry concept, involving the development of analytical methodologies with an environmental concern, encourages the use of direct analysis to avoid any sample treatment that involves energy and reagent consumption and generation of wastes. However, the determination of target analytes at trace concentration levels or in complex matrices frequently requires previous extraction, ...
DOI:
10.1016/j.trac.2019.03.016

7. Optimum DG placement for known power injection from utility/substation by a novel zero bus load flow approach

Author:
Das, Bikash; Mukherjee, V.; Das, Debapriya
Source:
Energy 2019 v.175 pp. 228-249
ISSN:
0360-5442
Subject:
analytical methods,   etc   ; algorithms; biomass; electric potential difference;     Show all 4 Subjects
Abstract:
... In this article, a novel analytical approach (named as zero bus load flow (ZBLF)) is proposed for DG placement to the distribution network under the scenario of known power injection from the utility/substation. The study is carried out for deferent load levels and for two different distribution networks (viz. 33- and 69-bus distribution networks). In this work, biomass (working at the power facto ...
DOI:
10.1016/j.energy.2019.03.034

8. Label-free and sensitive detection of coralyne and heparin based on target-induced G-quadruplex formation

Author:
Chen, Mingjian; Ma, Changbei; Zhao, Han; Wang, Kemin
Source:
Analytical methods 2019 v.11 no.10 pp. 1331-1337
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; detection limit; fluorescence; heparin; oligonucleotides;     Show all 5 Subjects
Abstract:
... Herein we propose a label-free and sensitive detection method for coralyne and heparin, based on utilizing the complex of adenosine₁₆ (A₁₆) and coralyne to induce the formation of a G-quadruplex scaffold. In the present work, two specific oligonucleotide strands were designed. Upon addition of coralyne, the two oligonucleotide strands formed a double chain through A₂–coralyne–A₂ coordination, whic ...
DOI:
10.1039/c9ay00175a

9. Analytical progress and challenges for the detection of oxygenated polycyclic aromatic hydrocarbon transformation products in aqueous and soil environmental matrices: A review

Author:
Pulleyblank, Coren; Cipullo, Sabrina; Campo, Pablo; Kelleher, Brian; Coulon, Frederic
Source:
Critical reviews in environmental science and technology 2019 v.49 no.5 pp. 357-409
ISSN:
1547-6537
Subject:
analytical methods,   etc   ; polycyclic aromatic hydrocarbons; soil; toxicity;     Show all 4 Subjects
Abstract:
... Over the past 20 years, a growing body of research has raised concerns about the toxicity, fate, and transport of oxygenated transformation products of polycyclic aromatic hydrocarbons. Research targeting these diverse compounds in soil and water systems has been challenged by a lack of standard analytical techniques and suitable reference materials. However, recent efforts towards the consolidati ...
DOI:
10.1080/10643389.2018.1547622

10. Preconcentration by solvent removal: techniques and applications

Author:
Fornells, Elisenda; Hilder, Emily F.; Breadmore, Michael C.
Source:
Analytical and bioanalytical chemistry 2019 v.411 no.9 pp. 1715-1727
ISSN:
1618-2642
Subject:
analytical methods,   etc   ; detection limit; evaporation; solvents;     Show all 4 Subjects
Abstract:
... Preconcentration is the aspect of analytical method development covering the need to improve detection sensitivity. This review collects the advances in a diversity of approaches to achieve preconcentration by solvent removal. Evaporation in microfluidic and paper-based devices is reported in a variety of forms and later compared to membrane-assisted evaporation. Sample partitioning in an immiscib ...
DOI:
10.1007/s00216-018-1530-8

11. A fluorescent fingerprint recording strategy for complex chemical solution

Author:
Duan, Qiannan; Lee, Jianchao; Zheng, Chaoqun; Zheng, Yunyun; Chen, Han
Source:
Analytical methods 2019 v.11 no.7 pp. 897-900
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; digital images; fluorescence; image analysis;     Show all 4 Subjects
Abstract:
... A fluorescent fingerprint recording strategy for complex chemical solution (CCS) analysis was proposed. Using ink-jet printing technology, the feature information of the CCS was expressed by fluorescence imaging method. Obtained fluorescent fingerprint images (named PEL-image) might provide some possible interlinks among different samples by the digital image analysis. ...
DOI:
10.1039/c8ay02702a

12. Multivariate optimization techniques in food analysis – A review

Author:
Ferreira, Sergio L.C.; Silva Junior, Mario M.; Felix, Caio S.A.; da Silva, Daniel L.F.; Santos, Adilson S.; Santos Neto, João H.; de Souza, Cheilane T.; Cruz Junior, Raineldes A.; Souza, Anderson S.
Source:
Food chemistry 2019 v.273 pp. 3-8
ISSN:
0308-8146
Subject:
analytical methods,   etc   ; chemometrics; food analysis; multivariate analysis;     Show all 4 Subjects
Abstract:
... This work presents a critical review of multivariate techniques employed for optimization of methods developed in food analysis. A comparison between the response surface methodologies has been performed, it evidencing advantages and drawbacks of these. Applications of the main chemometric tools (central composite and Box Behnken designs and Doehlert matrix) often utilized for optimization of samp ...
DOI:
10.1016/j.foodchem.2017.11.114

13. Analytical Solution for Fractional Gas Dynamics Equation

Author:
Raja Balachandar, S.; Krishnaveni, K.; Kannan, K.; Venkatesh, S. G.
Source:
National Academy science letters 2019 v.42 no.1 pp. 51-57
ISSN:
0250-541X
Subject:
analytical methods,   etc   ; accuracy; equations; gases; problem solving;     Show all 5 Subjects
Abstract:
... A new hybrid method based on fractional order shifted Legendre polynomials is constructed in the present study to obtain the analytical solution of a fractional gas dynamics equation. The theoretical analysis such as convergence analysis and error bound for the proposed technique have been demonstrated. The illustrated examples are shown to test the ability and accuracy of the proposed method. ...
DOI:
10.1007/s40009-018-0662-x

14. Overshoots in the water-level control of hydropower plants

Author:
Vesipa, Riccardo; Ridolfi, Luca
Source:
Renewable energy 2019 v.131 pp. 800-810
ISSN:
0960-1481
Subject:
analytical methods,   etc   ; engineering; industry; water power;     Show all 4 Subjects
Abstract:
... In the field of renewable-energies, a number of engineering problems are modeled as dynamical systems, and a key issue is the assessment of their stability to external disturbances. Stability analyses typically focus on the asymptotic stability, i.e., the fate of perturbations after long times from their onset. The system behavior at finite-times has attracted much less attention, although it play ...
DOI:
10.1016/j.renene.2018.07.090

15. Using the Analytical Target Profile to Drive the Analytical Method Lifecycle

Author:
Jackson, Patrick; Borman, Phil; Campa, Cristiana; Chatfield, Marion; Godfrey, Mark; Hamilton, Peter; Hoyer, Walter; Norelli, Francesco; Orr, Rachel; Schofield, Tim
Source:
Analytical chemistry 2019 v.91 no.4 pp. 2577-2585
ISSN:
1520-6882
Subject:
analytical methods,   etc   ; guidelines; oligonucleotides; uncertainty; vaccines;     Show all 5 Subjects
Abstract:
... Quality by design (ICH-Topic Q8) requires a prospective summary of the desired quality characteristics of a drug product. This is known as the Quality Target Product Profile (QTPP), which forms the basis for the design and development of the product. An analogous term has been established for analytical procedures called the Analytical Target Profile (ATP). The ATP, in a similar fashion to the QTP ...
DOI:
10.1021/acs.analchem.8b04596

16. Sediment removal efficiency estimation criteria for modern day desilting basins

Author:
Sinha, Satyajeet; Singh, Amar Pal
Source:
ISH journal of hydraulic engineering 2019 v.25 no.1 pp. 104-117
ISSN:
2164-3040
Subject:
analytical methods,   etc   ; basins; friction; sediments; water power;     Show all 5 Subjects
Abstract:
... Nowadays most of the desilting basins constructed or proposed in hydro power projects are modified in shape to increase desilting efficiency and structural stability; can be lined or unlined depending upon geological conditions faced. The desilting basin is an arrangement having increased cross-sectional area to reduce velocity of flow to such an extent that sediment particles settle within it eff ...
DOI:
10.1080/09715010.2018.1426057

17. Optimal active and reactive power allocation in distribution networks using a novel heuristic approach

Author:
Bayat, A.; Bagheri, A.
Source:
Applied energy 2019 v.233-234 pp. 71-85
ISSN:
0306-2619
Subject:
analytical methods,   etc   ; algorithms; electrical equipment; learning;     Show all 4 Subjects
Abstract:
... A wide range of solution methodologies has been presented in the literature for the siting and sizing of active and reactive power sources in radial distribution systems. The solution techniques are mainly classified into mathematical programming algorithms, heuristics, meta-heuristic methods, and the analytical approaches. This paper proposes a novel heuristic method for optimal allocation of dis ...
DOI:
10.1016/j.apenergy.2018.10.030

18. Mapping degrees of complexity, complicatedness, and emergent complexity

Author:
Allen, Timothy F.H.; Austin, Preston; Giampietro, Mario; Kovacic, Zora; Ramly, Edmond; Tainter, Joseph
Source:
Ecological complexity 2018 v.35 pp. 39-44
ISSN:
1476-945X
Subject:
analytical methods,   etc   ; genes; models;     Show all 3 Subjects
Abstract:
... This paper assesses the conceptualizations and analytical uses of complexity. Throughout the paper, we carefully eschew ontological issues, and sort out the epistemology of complexity. We try to explain why the ontology of complexity makes no sense to us, much like significance is neither material nor ontological. Our tool of choice is levels of analysis. First, we analyze the conceptualization of ...
DOI:
10.1016/j.ecocom.2017.05.004

19. Evaluation of analytical instrumentation. Part XXVII: a guide to good practice in the purchase of analytical instrumentation

Author:
Potts, Philip J.
Source:
Analytical methods 2018 v.10 no.27 pp. 3303-3309
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; instrumentation; purchasing;     Show all 3 Subjects
Abstract:
... This guide is designed for those involved in the purchase of analytical instrumentation, including analysts and laboratory staff, purchasing officers and senior managers. It provides recommendations on the stages that are required for the successful evaluation, purchase, installation and reliable operation of analytical instrumentation. The overall intention is to recommend a process where an anal ...
DOI:
10.1039/c8ay90075b

20. Pesticides in the atmospheric environment: an overview on their determination methodologies

Author:
Nascimento, Madson M.; da Rocha, Gisele O.; de Andrade, Jailson B.
Source:
Analytical methods 2018 v.10 no.37 pp. 4484-4504
ISSN:
1759-9679
Subject:
analytical methods,   etc   ; air; particulates; pesticides;     Show all 4 Subjects
Abstract:
... The increasing use of synthetic substances such as pesticides has been a major concern around the world, mainly due to the great potential of atmospheric contamination. Pesticides associated with atmospheric gases or particulate matter can enter the atmosphere, reaching remote areas. Due to the low concentration of pesticides in air samples and the high complexity of this type of matrix, new extra ...
DOI:
10.1039/c8ay01327f