Volume 02 Issue 04-2022
29
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
04
Pages:
29-34
SJIF
I
MPACT
FACTOR
(2022:
6.
108
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
The study of the effect of nickel on dimethylglyoxime from the composition of adsorbents used in this article
showed that the optimal conditions for this are graphically determined using a spectrophotometer. The analysis was
detected in a photocolorimeter.
KEYWORDS
Ni (II) ions, activated carbon adsorbent, used MDEA solution, Chugaev's reagent, pH.
INTRODUCTION
Photocolorometric
determinations
should
be
performed under optimal conditions that ensure the
complete formation of the analytical form in solution
and the avoidance or minimal deviation from the
Buger-Lambert-Behr law. , the selectivity of the
analytical (photometric) reaction and the pH
dependence of the optical density of the solution at a
given wavelength when the concentrations of the
detectable substance and reagent are constant to
select the optimal value of pH for light absorption.
Research Article
SELECTION OF OPTIMAL CONDITIONS FOR COMPLEX COMBINATION
OF NICKEL (II) ION WITH DIMETHYLGLYOXIME REAGENT
Submission Date:
April 18, 2022,
Accepted Date:
April 25, 2022,
Published Date:
April 30, 2022
Crossref doi:
https://doi.org/10.37547/ajast/Volume02Issue04-04
Ubaydullayeva Saidakhon
Lecturer, Fergana Polytechnic Institute, Uzbekistan
Sodikov Usmonali
Lecturer, Fergana Polytechnic Institute, Uzbekistan
Yunusova Nozima
Student, Fergana Polytechnic Institute, Uzbekistan
Azimbek Amirov
Student, Fergana Polytechnic Institute, Uzbekistan
Journal
Website:
https://theusajournals.c
om/index.php/ajast
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 02 Issue 04-2022
30
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
04
Pages:
29-34
SJIF
I
MPACT
FACTOR
(2022:
6.
108
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
The most favorable conditions in colored solutions are
those in which the difference between the absorption
in the analytical form and the initial reagents is the
largest. Under optimal conditions, small changes in pH
at maximum light absorption have virtually no effect
on the light absorption of the solution. The pH of the
solution
under photocolorometric reaction is
maintained using appropriate buffer solutions or
sufficient amounts of acid and alkali solutions. The
amount of analytical reagent to be added should be
sufficient to convert all the analyte to an analytical
form within a given concentration range. Excessive
addition of the reagent does not increase the yield of
the reaction product and does not increase the light
absorption of the solution. In photocolorometric
analysis, the solution should remain in the true
solubility in all ranges of the detected concentrations.
If this condition is not met, lower concentrations
should be used or preservatives should be used to
prevent solid phase formation.
Selection of the optimal light filter for the complex
combination of nickel (II) ion with dimethylglyoxime
reagent
It is known that each substance absorbs light of a
certain wavelength by nature, taking into account
that the maximum absorption area of a complex of
nickel (II) ions with dimethylglyoxime reagent was
determined as follows:
Method of determination: 5 ml of buffer solution,
0.01%, 1.0 ml of reagent solution and 1.0 ml of 50 μg /
ml nickel (II) solution were added to the 25 ml
volumetric flask and distilled water was added to the
flask mark. The optical density of the resulting
complex was measured on a photocolometer KFK-2
and in a cuvette with a absorption thickness l = 1.0 cm
at a different light filter relative to the specific
solution.
A solution containing all the components except the
metal ion, which is defined as the reference solution,
was used. The measurement results are shown in
Table 1, Figure 1.
λ
nm
310
370
410
450
490
550
610
670
720
A
0.110 0.205 0.260 0.340 0.450
0.470
0.455 0.410 0.380
Volume 02 Issue 04-2022
31
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
04
Pages:
29-34
SJIF
I
MPACT
FACTOR
(2022:
6.
108
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
The results show that the complex compound 6-light filter exhibits a high optical density at lmax = 550 nm. Further
work is carried out at lmax = 550 nm.
The dependence of the value of the optical density of the complex combination of nickel (II) ion with
dimethylglyoxime reagent on the solution medium (pH)
Given that one of the important conditions for the
reaction is the environment of the solution, universal
buffer solutions with different pH are prepared in the
selection of optimal conditions for the complex
combination of nickel (II) ion with pyridyl-2-azo-
naphthol-2 reagent. Method of determination: 5 ml of
5.0 ml of universal buffer solution with a pH of 3 to 12,
10 ml of 0.01% dimethylglyoxime solution, 5 grams of
used and purified activated carbon residue in a 25 ml
measuring tube. containing nickel 20ion), pour distilled
water up to the mark of the flask, and pour the mixture
into the cuvette: measured in a cuvette with thickness l
= 1.0 cm. The results are shown in Table 5,
Figure 2
pH
3
4
5
6
7
8
9
10
11
12
A
0.03
0.110 0.250 0/370 0.430
0.480
0.370 0.280 0.200 0.150
310
370
410
450
490
550
610
670
720
Ряд 1
0.11
0.205
0.26
0.34
0.45
0.47
0.455
0.41
0.38
-
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
Volume 02 Issue 04-2022
32
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
04
Pages:
29-34
SJIF
I
MPACT
FACTOR
(2022:
6.
108
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
Figure 2. Graph of the dependence of the optical density of a complex compound (Ni2 + - Rreagent) on the solution
medium (pH).
The results show that the maximum optical density of the complex compound was observed to be the highest at pH
= 8.0 and pH = 8.0 was chosen as the optimal medium because the optical density in this solution medium has the
maximum analytical signal. Subsequent studies used a buffer solution with a pH of 8.0.
The dependence of the optical density of a complex combination of nickel (II) ion with dimethylglyoxime reagent on
the composition of the buffer solution.
A universal buffer solution with pH = 8.0 was used to study the dependence of the composition of buffer solutions
on the components of the main reaction (Ni2 + -Reagent).
Method of determination: for the preparation of photometric solutions, as shown in the previous work, 5.0 ml of
solutions with pH = 8.0, 1.0 ml of 0.01% solution of pyridyl-2-naphthol-2 reagent in 50 ml measuring tubes, 50 mcg / ml
of nickel was diluted with distilled water to the mark of the flask by adding 1.0 ml of the solution, the optical
densities of the prepared analytical mixture were measured on a photocolor, in a cuvette with l = 1.0 cm relative to
the specific solution. Results obtained 6 given in the table.
Table №6
0.01
0.06
0.11
0.16
0.21
0.26
0.31
0.36
0.41
0.46
3
4
5
6
7
8
9
10
11
12
A
in
d
ic
ato
r
optimal Ph
optimal Ph
Volume 02 Issue 04-2022
33
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
04
Pages:
29-34
SJIF
I
MPACT
FACTOR
(2022:
6.
108
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
The results of the experiments show that when a
universal buffer solution was used, the complex
compound solution had the maximum optical density.
Subsequent studies used a universal buffer solution
with pH = 8.0.
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1.
O. Fayzullaev, N. Turobov, E. Roziev, A. Kuvatov,
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"Analytical chemistry. Laboratory studies. "New
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Аноров Рустамжон Абдурахмонович, Абидова
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poluchennyh-iz-zhirnyh-kislot-hlopkovogo-
soapstoka (дата обращения: 29.09.2021).
Buffer solution
Buffer solution name
pH
Āmiddle
name
Universal
Phosphate acid, wine acid,bhorat
8.0
0.480
Acid and alkali solution
Formic
Formic acid and formic sodium
8.0
0.405
Volume 02 Issue 04-2022
34
American Journal Of Applied Science And Technology
(ISSN
–
2771-2745)
VOLUME
02
I
SSUE
04
Pages:
29-34
SJIF
I
MPACT
FACTOR
(2022:
6.
108
)
OCLC
–
1121105677
METADATA
IF
–
5.582
Publisher:
Oscar Publishing Services
Servi
9.
Hamidov
Bosit,
Ubaydullayeva
Saidakhon
ANALYSIS OF NI (II) ION AND DIMETYLGLIOXIME
COMPLEX IN USED ADSORBENT // Universum:
технические науки. 2021. №5-6 (86). URL:
https://cyberleninka.ru/article/n/analysis-of-ni-ii-
ion-and-dimetylglioxime-complex-in-used-
adsorbent (дата обращения: 12.04.2022).
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Сайдалиев Отабек Турабекович РАЗРАБОТКА
ЭФФЕКТИВНОГО
КАТАЛИЗАТОРА
ГИДРООЧИСТКИ
ЛЕГКИХ
НЕФТЯНЫХ
ДИСТИЛЛЯТОВ // Universum: технические
науки.
2021.
№10-4
(91).
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https://cyberleninka.ru/article/n/razrabotka-
effektivnogo-katalizatora-gidroochistki-legkih-
neftyanyh-distillyatov
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