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Development of an extraction procedure and analysis of electrostatically stabilized silanates from aqueous solutions Cover

Development of an extraction procedure and analysis of electrostatically stabilized silanates from aqueous solutions

Oceanological and Hydrobiological Studies
Volume 49 (2020): Issue 3 (September 2020)
By: ,  ,   and    
Open Access
|Sep 2020
Figures & tables

Figures & Tables

Figure 1

Structures of analyzed compounds: a) 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at (72), b) 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxa-4-methylcyclopentan-3-on)at (73), c) 1-(N-morpholiniomethyl) spirobi(1-sila-2,5-dioxa-4-(i-propyl)cyclopentan-3-on)at (79)

Figure 2

Structure of a compound used in terminating electrolyte 4,4’-bis[(1-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at]

Figure 3

Chemical structures of bonded stationary phases used in the study: a) octadecyl, b) octyl, c) phenylpropyl stationary phases

Table 1

Mean recovery values [1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at (72), 1-(N-morpho liniomethyl)spirobi(1-sila-2,5-dioxa-4-methylcyclopentan-3-on)at (73), 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxa-4-(i-propyl)cyclopentan-3-on)at (79)] obtained on the columns used in the study (n = 5)

Type of extraction columnMean recovery values and SD (%)
(72)(73)(79)
RP Si–C1885.3 ± 4.284.7 ± 3.985.1 ± 3.5
RP Si–C882.2 ± 4.382.9 ± 4.983.7 ± 4.6
RP Si–FP89.3 ± 3.991.3 ± 3.693.9 ± 4.1
Figure 4

Isotachophoregram of the mixture of 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at (72), 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxa-4-methylcyclopentan-3-on)at (73), 1-(N-morpholiniomethyl) spirobi(1-sila-2,5-dioxa-4-(i-propyl)cyclopentan-3-on)at (79)

Table 2

Common parameters of optimal (72), (73) and (79) separation and determination by the isotachophoresis method

Parameters of the method
UV filter (nm)200
High Voltage Limit (kV)12
Sample rate (smp s−1)50
Polarity+ cations
Table 3

Optimum conditions for isotachophoretic separation of a mixture 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxacyclopentan-3-on)at (72), 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxa-4-methylcyclopentan-3-on)at (73), 1-(N-morpholiniomethyl)spirobi(1-sila-2,5-dioxa-4-(i-propyl)cyclopentan-3-on)at (79)

Considered parameters
StageTime (s)Intensity (μA)Comp (10 mV)Conductometric detector
150800
27012050
320900X
42505050
53251200X
Table 4

Characteristic of the applied analytical method

AnalyteLinearity1 (μg l−1)Coefficient of variation2 (%)Limit of detection3 (LOD) (μg l−1)Limit of quantification4 (LOQ) (μg l−1)Recovery5 (%)
(72)3.1–50.43.0–4.22.27.391 ± 5
(73)2.8–49.63.2–4.52.16.992 ± 3
(79)2.9–51.32.8–4.12.37.692 ± 4

1 determination coefficient above 0.9987

2 n = 6, the samples were analyzed twice

3 calculated from the limit of identification and coefficients of the calibration curve

4 LOQ = 3.3 x LOD

5 the sample was enriched with 4 ml of a solution containing 2 μg fil-1 of the examined ion, n = 6

DOI: https://doi.org/10.1515/ohs-2020-0022 | Journal eISSN: 1897-3191 | Journal ISSN: 1730-413X
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Language: English
Page range: 247 - 254
Submitted on: Feb 21, 2020
Accepted on: Apr 9, 2020
Published on: Sep 25, 2020
Published by: University of Gdańsk
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
extraction,
aqueous solutions,
ES-silanates,
determination
Related subjects:
Chemistry,
Chemistry, other,
Geosciences,
Geosciences, other,
Life sciences,
Life sciences, other

© 2020 Joanna Jabłońska, Mariusz Kluska, Nikolai Erchak, Stanisław Popiel, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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