320
Volume 5, Issue 10: Special Issue
(EJAR)
ISSN: 2181-2020
MPHAPP
THE 6TH INTERNATIONAL SCIENTIFIC AND PRACTICAL
CONFERENCE “MODERN PHARMACEUTICS: ACTUAL
PROBLEMS AND PROSPECTS”
TASHKENT, OCTOBER 17, 2025
in-academy.uz
SPECTROPHOTOMETRIC DETERMINATION OF TRACE AMOUNTS OF
SILVER(I) IONS USING H-RESORCINOL
1Tojiboye a F.M.
1Chulpano K.A.
2Smano a Z.A.
¹Tashken Pha maceu ical Ins i u e, Tashken ci y, Republic o Uzbekis an
²Na ional Uni e si y o Uzbekis an, Tashken ci y, Republic o Uzbekis an
e-mail: [email p o ec ed]
h ps://doi.o g/10.5281/zenodo.17336892
Rele ance: A new o ganic eagen , H- eso cinol, was employed as a highly sensi i e, selec i e,
and apid-ac ing eagen o he de e mina ion o sil e (I) ions. The in e ac ion o sil e (I) wi h H-
eso cinol occu s h ough he o ma ion o a s able coo dina ion bond. A pH = 10, an ammonia bu e
solu ion was used as a backg ound elec oly e, esul ing in he o ma ion o a 1:1 (sil e :H- eso cinol)
mola a io complex. This app oach is o pa icula impo ance, as he eliable and selec i e
de e mina ion o ace sil e ions holds signi ican analy ical alue in en i onmen al moni o ing,
pha maceu ical analysis, and indus ial quali y con ol, whe e he accu a e de ec ion o e en e y low
concen a ions o sil e is essen ial.
Pu pose o he s udy: The de e mina ion o Sil e (I) ion wi h H- eso cinol as an o ganic
eagen expands he possibili ies o analy ical chemis y. The IR spec um o he ob ained complex
con i med he coo dina ion bond o ma ion.
Ma e ials and me hods: A spec opho ome ic mic oanaly ical me hod was applied. The
complex o ma ion was ca ied ou a pH=10, in an ammonia bu e solu ion. The composi ion o he
complex was s udied using IR spec oscopy. The IR spec um was analyzed by s udying he main
ib a ions (s e ching and de o ma ion ib a ions), and he coo dina ion o sil e was con i med
h ough g oup ib a ions.
Resul s: The IR spec um o he complex showed he ollowing abso p ion bands: 3327 cm⁻¹
(b oad peak, N–H s e ching ib a ion), 2921 cm⁻¹ and 2853 cm⁻¹ (alipha ic C–H s e ching
ib a ion), 2241 cm⁻¹ (–C≡N s e ching ib a ion), 1651 cm⁻¹ and 1541 cm⁻¹ (C=O and C=N
s e ching ib a ions), 1493 cm⁻¹ and 1339 cm⁻¹ (a oma ic C=C and C–N s e ching ib a ions), 1193
cm⁻¹ and 1036 cm⁻¹ (C–O–C and C–N s e ching ib a ions), 813 cm⁻¹, 596 cm⁻¹, 509 cm⁻¹, and 493
cm⁻¹ (me al–ligand ib a ions, Ag–N and Ag–O coo dina ion bonds). These esul s con i m he
coo dina ion o sil e ions wi h he ligand (H- eso cinol)
321
Volume 5, Issue 10: Special Issue
(EJAR)
ISSN: 2181-2020
MPHAPP
THE 6TH INTERNATIONAL SCIENTIFIC AND PRACTICAL
CONFERENCE “MODERN PHARMACEUTICS: ACTUAL
PROBLEMS AND PROSPECTS”
TASHKENT, OCTOBER 17, 2025
in-academy.uz
Conclusions: H- eso cinol is a sui able o ganic eagen o he de e mina ion o sil e (I) ions.
The ob ained IR spec al da a con i med he coo dina ion o sil e ions wi h he unc ional g oups o
H- eso cinol, mainly ia Ag–N and Ag–O coo dina ion bonds. Due o he high sensi i i y and
selec i i y o his me hod, sil e (I) ion can be de e mined apidly and accu a ely, e en in ace
amoun s.
C: Use s BRUKER Documen s B uke OPUS_8.7.10 DATA MEAS 5-N.0 5-N Ins umen ype and / o accesso y
2/6/2025
3327.78
2921.86
2853.08
2241.40
2202.65
2186.14
2162.91
2026.53
1976.54
1920.50
1726.48
1651.83
1541.97
1449.17
1358.37
1193.33
1169.09
1036.31
813.42
724.63
650.56
619.83
539.81
514.48
493.83
434.04
500100015002000250030003500
Wa enumbe cm-1
92 93 94 95 96 97 98 99 100
T ansmi ance [%]
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