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Spectrophotometric method

Tìm thấy 20+ kết quả cho từ khóa "Spectrophotometric method"

Preparation and catalytic evaluation of Au/γ-Al2O3 nanoparticles for the conversion of 4-nitrophenol to 4-aminophenol by spectrophotometric method

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Preparation and catalytic evaluation of Au/ γ -Al 2 O 3 nanoparticles for the conversion of 4-nitrophenol to 4-aminophenol by spectrophotometric method. The catalytic activity was evaluated for the reduction of an organic pollutant 4-nitrophenol (4NP) to 4-aminophenol (4AP) by spectrophotometric analysis.

Spectrophotometric methods for the determination of fluoride ion using indole-3-acetic acid interaction with iron(III)

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The maximum absorption wavelength of the complex and the detection limit of the method were 525 nm and 0.26 mg/L, respectively. The interfering effects of the different cations (Ag. The method was applied to standard and real samples and the resulting data were statistically compared at a confidence level of 95%. with those obtained with the use of a fluoride-selective electrode.. Key words: Fe(III) indole-3-acetic acid complex, fluoride, spectrophotometric method.

Spectrophotometric determination of molybdenum using surfactant-mediated liquid–liquid extraction

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Spectrophotometric determination of molybdenum using surfactant-mediated liquid–liquid extraction. Abstract: A new spectrophotometric method has been developed for determination of molybdenum using surfactant- mediated liquid–liquid extraction.

A simple automated microplate method for determining reducing sugars in food extracts and synthetic serum using cupric-neocuproine as reductant

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The results were compared to those of the conventional alkaline Cu(II)-Nc spectrophotometric method.

Novel optical sensor-based method for determining total tocopherol content in serum

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Sample solutions, to which different standard additions of α -tocopherol were made, were separately analyzed with the proposed optical sensor method.. The CUPRAC spectrophotometric method for determination TTC of serum. The TTC of organic extract of serum was evaluated by the CUPRAC spectrophotometric method. 25 To a test tube were added 1 mL of CuCl 2 , 1 mL of Nc, 0.8 mL of DCM extract of serum, and 3.2 mL DCM solution in this order.

A novel core-shell-based chromatographic method supported by ratio derivative spectrophotometry for the simultaneous determination of perindopril, indapamide, and amlodipine ternary mixtures

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For the spectrophotometric method, the first derivative of the ratio spectra by division of the absorption spectrum of the ternary mixture by a standard spectrum of binary mixture of the components method (DD 1 ) was used.

Spectrophotometric determination of iron species using ionic liquid ultrasound assisted dispersive liquid–liquid microextraction

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After extraction, the extracted Fe(II) in the sediment phase was determined by spectrophotometric method. The concentration of Fe(III) was determined from the difference in the concen- tration of total iron and Fe(II). The effect of various experimental parameters on the extraction was investigated and the method was applied to the determination of Fe species in natural water samples..

vlas 031

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Determination of iron, titanium dioxit content Spectrophotometric method Quặng Thiếc Xác định hàm lượng thiếc.

Determination of Pb(II) in natural water with dibromo-p-methyl-sulfonazo by the light-absorption ratio variation approach

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In order to establish the validity of the proposed procedure, the method was applied to the determination of the content of Pb(II) in certified reference material GBW08571. Comparative information from some studies on spectrophotometric determination of Pb(II) by various methods is given in Table 4. Determination of Pb(II) in natural water.. Comparison of the present method with other spectrophotometric methods for the determination of Pb(II)..

A simple and effective method for determination of the antithyroid drug carbimazole using ruthenium trichloride

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A simple and effective method for determination of the antithyroid drug carbimazole using ruthenium trichloride. Abstract: An accurate, precise, and simple spectrophotometric method is proposed for the determination of the antithyroid drug carbimazole using ruthenium(III) chloride. The metal:ligand (M:L) ratio of the complex was confirmed by the mole ratio and Job’s method of continuous variation, suggesting a 1:2 stoichiometry.

Voltammetric determination of itopride using carbon paste electrode modified with Gd doped TiO2 nanotubes

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UV Spectrophotometric Method for the Estimation of Itopride Hydrochloride in Pharmaceutical Formulation E-Journal of Chemistry 2010. Simultaneous determination of a binary mixture of. pantoprazole sodium and itopride hydrochloride by four spectrophotometric methods. doi.org/10.1016/j.saa . Spectrophotometric simultaneous determination of Rabeprazole Sodium and Itopride Hydrochloride in capsule dosage form.

Ứng dụng kỹ thuật chiết điểm mù để xác định hàm lượng sắt trong mẫu nước bằng phương pháp quang phổ

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Total iron content in water samples was determinated by combination of cloud point extraction technique and spectrophotometric method. The method involved a selective hydrophilic complex formation between iron (II) and 1,10-phenanthroline in a buffer pH 5, which can efficiently be extracted in surfactant-rich phase of Triton X-100 and determined spectrophotometrically at λmax 512 nm. The main factors that influence the efficiency of cloud point extraction such as the pH of sample solution;.

Preconcentration of rifampicin prior to its efficient spectroscopic determination in the wastewater samples based on a nonionic surfactant

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The UV/vis spectrophotometric method was adapted for the measurement of rifampicin content after the phase separation.. Triton-X 100 was used as the nonionic surfactant which contains hydrophilic polyethylene chain feasible for the extraction of analyte.. Various analytical parameters that can affect the extraction efficacy were optimized to achieve linearity of the proposed method in the concentration range of mgL –1 .

Drugs and Poisons in Humans - A Handbook of Practical Analysis (Part 71 and End)

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In this chapter, a simple procedure of the modifi ed spectrophotometric method for Met-Hb is briefl y described.. It can be prepared by dilution of two parts of the above reagent with three parts of distilled water.. A 0.2-mL volume of whole blood is added to the tube and mixed well.. Th e pH of the supernatant should be around 6.9.. Four 4-mL volume cuvettes of the same type are cleaned well by washing with distilled water. To cuvettes A and B, a 0.5-mL volume each of distilled water is added.

Influence of hydrodynamic parameters on the synthesis of target metabolites and the degree of disintegration during the submerged cultivation of micromycetes

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To convert the units of activity obtained by the polarimetric method into the unit of the standard glucose oxidase method, the convers ion factor K = 1.76 obtained experimentally was used.. The degree of destruction of producer cells was determined by the amount of nucleic acids in the culture broth filtrate by the spectrophotometric method (Spirin et al., 1958.

Tiêu chuẩn Việt Nam, quốc tế

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Tiêu c huẩn viện dẫn - ISO Black pepper and white, whole or ground – Determination of piperine content – Spectrophotometric method (Hạt tiêu đen và hạt tiêu trắng nguyên hạt hoặc dạng bột – Xác định hàm lượng piperin – Phương pháp so màu phân quang. TCVN Hạt tiêu – Phương pháp thử. Kỹ thuật đếm khuẩn lạc.

tcvn7048-2002 - Thit hop

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Phương pháp xác định tổng số bào tử nấm men, nấm mốcTCVN Thịt tươi - Qui định kỹ thuật.TCVN Thịt lạnh đông - Qui định kỹ thuật.ISO Meat and meat products – Detection of chloramphenicol content – Method usingliquid chromatography (Thịt và sản phẩm thịt – Phát hiện hàm lượng cloramphenicol – Phương phápsử dụng sắc ký lỏng).AOAC 945.58 Cadmium in food - Dithizone method (cadimi trong thực phẩm – Phương pháp dithizon)AOAC 956.10 Diethylstilbestrol in feeds - Spectrophotometric method (Dietylstylbestrol

Sensitive determination of hydrogen peroxide in real water samples by high spin peroxo complex

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The performance of the proposed method for the determination of H 2 O 2 in real water samples was compared with the other published spectrophotometric methods in literature (Table 5). Analytical figure of merits of the proposed method for the determination of H 2 O 2. Comparison of the proposed method with other spectrophotometric techniques for the determination of H 2 O 2.. The effects of various well-known ions presented in the real water samples were studied in interference studies..

Khảo sát tính chất đặc trưng Von-ampe của một số hợp chất có hoạt tính sinh học và ứng dụng trong phân tích

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Soc, Vol.54(3), pp.234-237.. (2006), “Validated spectrophotometric method for the assay of nifedipine in bulk and commercial dosage forms”, Science Asia, Vol.32, pp. (1999), “Indirect polarographic and cathodic stripping voltammetric determination of cefaclor as an alkaline degradation product”, Journal of Pharmaceutical and Biomedical Analysis, Vol.21, pp. 565, pp.516-522.. (1988), “Pulse- polarographic determination of beta-lactam antibiotica and its clinical applications”, Fresenius Z Anal Chem

T I Ê U C H U Ẩ N V I Ệ T N A M

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Phương pháp phát hiện ký sinh trùng.ISO Meat and meat products – Detection of chloramphenicol content – Methodusing liquid chromatography (Thịt và sản phẩm thịt – Phát hiện hàm lượng cloramphenicol –Phương pháp sử dụng sắc ký lỏng).AOAC 945.58 Cadmium in food - Dithizone method (cadimi trong thực phẩm – Phương phápdithizon) AOAC 956.10 Diethylstilbestrol in feeds - Spectrophotometric method (Dietylstylbestrol trong thứcăn gia súc – Phương pháp quang phổ)AOAC 995.09 Chlortetracycline, Oxytetracycline