Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userDetermination of some Optimal Conditions for Analyzing the two Organophosphorus Pesticides Dimethoate and Dichlorovos in Greenhouses' Soil in Burj–Islam - Lattakia by HPLC
تحديد بعض الشروط المثلى لتحليل المبيدين الفوسفوريين Dimethoate وDichlorovos في ترب الزراعات المحمية لمنطقة برج اسلام – محافظة اللاذقية باستخدام تقانة HPLC
651
0 0
0.0
(
0
)
Added by
Tishreen University ورقة بحثية
Publication date
2020
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
أُجريت هذه الدراسة في محافظة اللاذقية (قرية برج اسلام) بهدف دراسة مستوى تلوث تربة الزراعات المحمية بمبيدين هما Dimethoate وDichlorovos من مجموعة المبيدات الفوسفورية العضوية, وقد تم تحديد طول الموجة المناسب لتحليل كل من المبيدين باستخدام تقانة الكروماتوغرافيا السائلة عالية الأداء المزودة بكاشفUV/DAD . بينت نتائج الدراسة أن طول الموجة المناسب لتحليل مبيد اﻟ Dimethoateهو nm 200, بينما كان طول الموجة المناسب لتحليل اﻟDichlorovos nm 195, وقُدّرت نسب الاسترجاع للمبيد Dimethoate عند طول الموجة 200 nm فكانت 101.33 ± 3.868 وللمبيد Dichlorovos عند طول الموجة nm 195 كانت 98.995 ± 2.078. كما أظهرت الدراسة أن تربة الزراعات المحمية ملوثة بآثار المبيدين فقد وُجد Dimethoate بتراكيز تتراوح بين ppm (0.839–2.668), في حين وُجد Dichlorovos بتراكيز تتراوح بين ppm (10.046–44.359), مما يدل على الاستخدام المكثف للمبيدين لاسيماDichlorovos الذي كان تركيزه أعلى من تراكيز Dimethoate في المواقع المدروسة.
This study was conducted in Lattakia Governorate (Burj Islam Village) to study the level of contamination of the greenhouses soil with the two organic phosphorous pesticides Dimethoate and Dichlorovos. The optimal wavelength was determined for the analysis of both pesticides using High Performance Liquid Chromatography (HPLC) technology with UV/DAD detector. According to the results, the optimal wavelength for the analysis of Dimethoate is 200 nm, while it was 195 nm for the analysis of Dichlorovos. The recovery of Dimethoate was estimated at wavelength 200 nm which was 101.33 ± 3.868 and for dichlorvos at wavelength 195 nm when it was 98.995 ± 2.078. The results also showed that the greenhouses soil were contaminated with the residues of both pesticides, Dimethoate was detected in concentrations between (0.839 - 2.668) ppm, while Dichlorovos concentrations were between (10.046 - 44.359) ppm, indicating extensive use of both especially Dichlorovos, whose concentrations were higher than Dimethoate's in the studied sites.
References used
FERNANDO,C. Pesticides, environment, and food safety.Food and Energy Security,6.2,2017, 48-60
Alhumwi, M; Amin, y. removal of some pesticides contaminated water by bentonite.Chemistrydepartment, College of Science, Damascus university: Syria 2009, 9-10.(In Arabic)
YADAV, I. C; DEVI, N. L.Pesticides classification and its impact on human and environment.Environmental Science and Engineering.6,2017,140-158
rate research
Read More
Tylosin and Spiramycin are medium-spectrum macrolide antibiotic used exclusively in veterinary medicine for the treatment of a wide range of infections.This research deals with the determination of optimal conditions for simultaneous separation and d
etermination of two macrolides antibiotics (Tylosin and Spyramicine), using C8 and C18 Chromatographic separation columns and doing the comparison between them in order to develop a rapid and sensitive method which can be used to measure these two compounds using High Performance Liquid Chromatography – Diode array detector (HPLC-DAD).
This study has used the gradient elution for mobile phase and revealed that the best conditions for separation and determination are conjugated with the best retention times and best areas for both studied compounds using a mobile phase consisted of an aqueous solution of anhydrated disodium Hydrogen Phosphate at pH=2.4 and an organic solution of acetonitrile with a ratio of 80:20v/v (solution A) and acetonitrile (solution B) [Na2HPO4(0.04M) pH:2.4/CAN (80:20v/v)]/ ACN, temperature 40°C for both columns, flow ratio of 1ml/min. for the mobile phase and maximum absorption wave length 280 nm, 232nm for Tylosin and Spyramicine respectively. The best peak areas are recorded as 5.759, 5.927 for Tylosin and Spyramicine 0.10ppm respectively, using C8 Chromatographic separation column in comparison with the best peak areas 4.432, 4.212 respectively at the same concentration using C18 Chromatographic separation column. It was noticed that the best retention times for Tylosin and Spyramicine were 7.013, 4.214min. respectively at concentration of 0.10ppm using C8 Chromatographic separation column in comparison with the best retention times 7.641, 5.898min. respectively at the same concentration using C18 Chromatographic separation column. The calibration curves for both separated compounds on C8 Chromatographic separation column showed a good linearity within a concentration range of 0.0010-0.10 ppm ≈ 1-100ppb at the two wave lengths λmax. = 280, 232nm respectively.
The purpose of this article is how to determine simultaneously the content of
some Anti-Inflammatory (NSAIDS):, Ketoprofen, Flurbiprofen, Orphenadrine
Citrate (Muscle relaxant( and Clopidogrel Bisulfate (Anti-thrombocytopenia( in
pure and pharmace
utical formulations by Reverse Phase-High performance liquid
chromatography (RP-HPLC).
This investigation was carried out in the fields and laboratories of Pome and
Grapevine Department, GCSAR/Syria, on some apple varieties i.e. Richared,
Mutsu and Tourly Winsap to determine the optimal harvest date and its effect on
storability. Fr
uits were harvested in (16/9, 26/9, 7/10, 17/10 and 30/10) depending
on physical and chemical maturity indicators, and stored with the study of changing
in quality indicators and weight lost monthly. The results showed that the studied
varieties differed in their storability according to harvest date, Richared fruits in
26/9 showed long storage for seven months with weight loss of 4.9%, fruit firmness
6.4 kg/cm2, and 18.7% TSS. While the storability was six months for Mutsu fruits
which harvested in 7/10 with weight loss of 4.4%, and fruit firmness 6.1 kg/cm2,
and finally, Tourly Winsap fruits which were stored for five months in 7 and 17/10
harvest dates with fruit firmness 5.1 kg/cm2. Moreover, the three varieties were able
to storage for three months when harvested in 30/10 with weight loss of 3.3%, 4.4%
and 4.5% in Tourly Winsap, Richared and Mutsu respectively, which considered
as consuming maturity for these varieties. These results indicated to the various
storage periods according to fruits harvest time, and the storability, which assists
in regulating offer and demand, and providing markets with fruits for long period,
however harvesting at optimal time reducing the total weight loss, in addition to
high quality indicators.
The objective of this study is to study some of the optimal analytical conditions for the
determination of the Cu2+ ion using potentiometric titration method using the platinum
electrode as a working electrode and the AgCL/Ag as a Reference electro
de.
In this study, the technical conditions were studied (working Electrode type, Reference
Electrode type, Direction of titration, delay time, Proportional band, Speed of stirring)
and the analytical conditions (pH value, time factor, quantity of solid KI added, electrolyte
type and its concentration, detection limit) were studied using oxidation - reduction
reactions as the method of iodide titration which applied successfully electrochemical for
determine the Cu2+ ion.
It wasdetected for the ability of a local fungus A.niger, A.alternata, F.oxysporum,
F.solaniandP.devirsum to produce the enzyme lipase in solidmedium including Triputyrin.
The enzymic activity of P.devirsum fungus is distinction from other fungus,
while the
fungus A.alternata failed to produce the lipase. Then they tested quantitatively using a
liquid center to determine the best conditions for best growth to fungus P.devirsum and for
best produce to enzyme lipase. It indicates that corn oil is the best carbonic source for
growth of fungus after 5 days of incubation, as biomass reached(15.99g/L) and effective of
lipase (67.43%).And it found that the concentration of 2% of the corn oil has achieved best
biomass
(17.83g/L) and best production of enzyme lipase effectively(72.78%). Temperature 34 c
achieved the highest biomass (18.94g/L) and best production of enzyme lipase (76.16%),
and pH =7 was the best for the growth of fungus in biomass reached (21.87g/L) and
production of lipase effectively (82.93%). While the nitrogenic source gave peptone
biggest value to biomass (27.08 g/L) and highest production for enzyme (88.12%) in
optimal conditions reached.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
