Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Mahmood Payehghadr"'
Publikováno v:
شیمی کاربردی روز, Vol 17, Iss 65, Pp 55-64 (2023)
In this study switchable solvent liquid phase microextraction (SSLPME) followed by GC-MS detection has been developed for preconcentration and determination of total petroleum hydrocarbons (TPHs) in water samples. The extraction technique makes use o
Externí odkaz:
https://doaj.org/article/afd6a174ca3a41959cffaec1c9214634
Publikováno v:
شیمی کاربردی روز, Vol 16, Iss 59, Pp 21-32 (2021)
In this study, the concentration of effective amino acids in plant metabolism was measured in different soil and fertilizer samples by high performance liquid chromatography. First, the amino acids of the sample were extracted with 0.1 N hydrochloric
Externí odkaz:
https://doaj.org/article/47dfc5fd353a4f29928bcce1cce76d0d
Autor:
Hossein Tavallali, Hossein Malekzadeh, Mohammad Ali Karimi, Mahmood Payehghadr, Gohar Deilamy-Rad, Mahboobeh Tabandeh
Publikováno v:
Arabian Journal of Chemistry, Vol 12, Iss 7, Pp 1487-1495 (2019)
Multi-walled carbon nanotubes (MWCNTs) were chemically functionalized by glutaric dihydrazide (GDH) and characterized with FT-IR technique. This new sorbent was used for enrichment and preconcentration of Co(II), Cd(II), Pb(II), and Pd(II) ions. The
Externí odkaz:
https://doaj.org/article/11335444a1b0478a928039aaa29354e5
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 10, Iss 7, Pp 489-495 (2018)
A procedure for separation and preconcentration of trace amounts of Cu2+ and Cd2+ from aqueous media is proposed. The procedure is based on the adsorption of Cu2+ and Cd2+ ions on octadecyl bonded silica membrane disk modified with, Pyridine 2,6-diyl
Externí odkaz:
https://doaj.org/article/6fedde3a9acd4d6cbaa7bf432d3f55e8
Autor:
Mahmood Payehghadr, Hamidreza Haghgoo Qezelje, Farzaneh Miri Dosangani, Asghar Amiri, Samaneh Hosseini, Masoumeh Nabati Hesarlo, Amirsajad Soleymani Kia
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 10, Iss 6, Pp 430-434 (2018)
The complexation reaction between some heavy metal ions such as: Ag+, Co2+, Hg2+, Zn2+, Ni2+, Cu2+, Cd2+, Mn2+, Cr3+, Fe3+ and Pb2+ with 2,3-dimethyl-1,2-dihydro-8H-pyrazolo[5,1-a]isoindol-8-one, ligand in acetonitrile as nonaqueous solvents at 25 º
Externí odkaz:
https://doaj.org/article/e5ea0ff396024133b05f4b90e62d472f
Publikováno v:
Acta Chimica Slovenica, Vol 65, Iss 2, Pp 312-318 (2018)
In this research, the electro-catalytic activity of nickel-copper (Ni-Cu) alloy towards oxidation of ethanol and its possible redox process were investigated in alkaline solution. For this purpose, cyclic voltammetry, chronoamperometry and electroche
Externí odkaz:
https://doaj.org/article/707c90b126f34b78be419b4f6e01497e
Autor:
Mahmood Payehghadr, Farzaneh Nourifard
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 9, Iss 5, Pp 354-359 (2017)
A high selective and sensitive anodic stripping differential pulse polarographic method for determination of ultra-trace amounts of Cu2+ ion in water samples is proposed. The method is based on the separation and preconcentration of Cu2+ on an octade
Externí odkaz:
https://doaj.org/article/64f89896d8274be9997240e6652da537
Autor:
Mahmood Payehghadr
Publikováno v:
Orbital: The Electronic Journal of Chemistry, Vol 9, Iss 4, Pp 266-270 (2017)
The complex-formation reactions between Zn2+, Cu2+, Co2+, Ni2+ and Cd2+ ions with, N,N'–Bis-(salicylidene)1,8-diamino-3,6-dioxaoctan Schiff base ligand, has been studied by spectrophotometric method in acetonitrile at various temperatures. The form
Externí odkaz:
https://doaj.org/article/23695a7955d14e39bbeb6f9576f4171b
Autor:
Mahmood Payehghadr, Homa Shafiekhani, Ali Reza Sabouri, Abdoll Mohammad Attaran, Mohammad Kazem Rofouei
Publikováno v:
Iranian Journal of Chemistry & Chemical Engineering, Vol 33, Iss 2, Pp 1-10 (2014)
A facile and highly efficient method have been developed for the preconcentration of the mercury content in crude oil and gasoline samples after digestion with microwave-assisted digestion. Octadecyl silica membrane disk has been modified by the rece
Externí odkaz:
https://doaj.org/article/e3a3cb529e6445c6bfbaed046ffdc43b
Publikováno v:
Iranian Journal of Chemistry & Chemical Engineering, Vol 31, Iss 3, Pp 1-7 (2012)
The complexation reaction between 1,13-bis(8-quinolyl)-1,4,7,10,13-pentaoxatridecane (Kryptofix5) ligand with Zn2+, Ni2+, Co2+, Pb2+, Mn2+ and Cu2+ ions were studied conductometrically in different AcetoNitrile-NitroMethane (AN-NM) and AcetoNitrile-M
Externí odkaz:
https://doaj.org/article/82dd059d778344ffacbd994696234eda