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分析测试学报 1999年第1期 32-35页

作者： F.A.Nour el Dien, M.A.Zayed, G.G.Mohamed(Chemistry Department, Faculty of Science, Cairo University, Giza A.R.Egypt )

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ｎｔｒｏｄｕｃｔｉｏｎｐ＿ＡＡＰｉｓｏｎｅｏｆｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔ，ｓａｆｅ，ａｎｄｅｆｅｃｔｉｖｅｎｏｎ＿ｓａｌｉｃｙｌａｎａｌｇｅｓｉｃａｎｄａｎｔｉｐｙｒｅｔｉｃａｇｅｎｔｓ．Ｉｔｉｓｔｈｅｂｉｏｄｅｇｒａｄａｔｉｏｎｐｒｏｄｕｃｔ...

关键词： p_AAP Determination Bromine spectrophotometric method

spectrophotometric method for the Determination of Oxidative IonsWith Decoloring Reaction Using HCPCF

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Chemical Research in Chinese Universities 2001年第Z1期17卷 211-页

作者： KOU Zongyan Department of Chemistry Gansu Education College

HCPCF is a color reagent for the determination of vanadium, zinc and magnesium, etc. To the best of our knowledge, no work on the decoloring reaction for analytical use of HCPCF for the determination of oxidative anions has been report. In this work, we found that some oxidative anions can oxidize HCPCF in acid medium, forming a colorless product. In addition, surfactant was used in this work, because of the low solubility of HCPCF in aqueous solutions. The purpose of this work is to establish a new, rapid and simple spectrophotometric method for the determination of NO2-, BrO3-,IO3-, IO4-and Cr2O7-based on the reaction between HCPCF and analytes in the presence of emulsion OP.

关键词： determination of spectrophotometric method used in

A New spectrophotometric method for Measuring COD of Seawater

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Journal of Ocean University of China 2006年第2期5卷 137-140页

作者： LIU Ying JI Hongwei XIN Huizhen LIU Li Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of China Qingdao 266003 P. R. China

This research studied a new spectrophotometric method for measuring the chemical oxygen demand （COD） of seawater. In this method, the COD was measured using a spectrophotometer instead of titrating with sodium thiosuiphate. The measuring wavelength was selected to be 470 nm, and the COD of three standard glucose solutions （COD = 0.5, 1.5 and 2.5 mgL^-1, respectively） and two seawater samples （from the South Yellow Sea and Jiaozhou Bay） were measured using the spectrophotometric method and titrimetric method respectively. The results showed that the spectrophotometric method was somewhat better than the titrimetric method. The relative standard deviation （RSD） of the spectrophotometric method was less than 2.7%, and the recovery of seawater samples ranged from 96.3% to 103.8%. In addition, the spectrophotometric method has other advantages such as expeditiousness, operation simplicity, analysis automatization, etc. Therefore the spectrophotometric method can be used to measure the COD of seawater with satisfactory results.

关键词： chemical oxygen demand (COD) spectrophotometric method seawater

Effects of Standing Time during Pretreatment on the Nitrite Concentration Detected by spectrophotometric method

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Journal of Materials Science and Chemical Engineering 2024年第2期12卷 73-83页

作者： Yingfei Zeng Juan Hu Xianglong Bian Qianfeng Xia Tingwei Hu Key Laboratory of Tropical Translational Medicine of Ministry of Education School of Tropical Medicine and the Second Affiliated Hospital Hainan Medical University Haikou China Department of Bloodbank Children’s Hospital of Chongqing Medical University National Clinical Research Center for Child Health and Disorders Ministry of Education Key Laboratory of Child Development and Disorders Chongqing Key Laboratory of Pediatrics Chongqing China

Food safety problems caused by excessive nitrite addition have been frequently reported and the detection of nitrite in food is particularly important. The standing time during the pretreatment of primary sample has a great influence on the concentration of nitrite tested by spectrophotometric method. In this context, three kinds of food samples are prepared, including canned mustard, canned fish and home-made pickled water. A series of standing times are placed during the sample pretreatments and the corresponding nitrite contents in these samples are detected by spectrophotometric method based on N-ethylenediamine dihydrochloride. This study aims to find out a reasonable standing time during the pretreatment of food sample, providing influence factor for precise detection of nitrite.

关键词： Standing Time spectrophotometric method Nitrite Detection

Rapid Estimation on the Sperm Concentration in Boar Semen by spectrophotometric method

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Animal Husbandry and Feed Science 2012年第4期4卷 150-152,168页

作者： PENG Yi ZHANG Liang Guiyang Provincial Center for Animal Disease Control and Prevention Swine Research Institute Chongqing Academy of Animal ScienceKey Laboratory of Pig Industry SciencesMinistry of Agriculture

[ Objective] To establish the standardized spectrophotometric method to determine boar sperm concentration. [ method ] The relation- ships between absorbance （A）, transmittance （T） and sperm concentration （C） of different wavelengths （450, 550, 650 nm） were compared. [ Result] The maximum sperm concentration detected by absorbance presented an upward trend with the increase of the wavelengths, 202 mitliorVml （450 nm）, 224 million/ml （550 nm） and 235 mUlion/ml （650 nm）, respectively, but the stability of repeated measurement was decreased. With the increase of sperm dilution times, the stability of repeated measurement of transmittance was reduced, and when dilution times were more than 10 times （450 nm）, 6 times （550 nm） and 4 times （650 nm）, differences appeared between the observed values of repeated measurement. [ Con- clusion] Wavelength at 450 nm was found to be the most sensitive and reliable, and sperm concentration presented cubic functional regression rela- tionship or power functional regression relationship with absorbance or transmittance, respectively. The regression equation for the standard curve at 450 nm was C400 = 0.48A3 - 0.76A2 ＋ 0.67A - 0.066 （ R = 0.951 ） and C400 = 1.657T -0.108. 8 （ R = 0.940）.

关键词： Swine Sperm concentration spectrophotometric method

Evaluating the Efficiency of Cadmium Removal by Alginate Hydrogels from Water Using 5,7-Dibromo-8-hydroxyquinoline as a Complexing Reagent

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Precision Chemistry 2023年第9期1卷 538-547页

作者： Abhijit B.Phalke Varuna S.Watwe Sunil D.Kulkarni Preeti S.Kulkarni Post Graduate and Research Center Department of ChemistryMES Abasaheb Garware CollegePune 411004 MaharashtraIndia Affiliated with Savitribai Phule Pune University(Formerly University of Pune) Pune 411007 MaharashtraIndia

Cadmium toxicity in wastewater is a rising concern due to industries like batteries,metallurgy,electroplating,plastic stabilizers,and *** quantitative detection of Cd^(2+)and its remediation from wastewater samples are of major concern from an environmental point of *** the present work,an effective spectrophotometric method has been reported using 5,7-dibromo-8-hydroxyquinoline(DBHQ)as a complexing agent for Cd^(2+).This method has advantages like using recyclable,less toxic solvents and easy sample *** limit of detection,limit of quantification,and sensitivity of the proposed method were found to be 33.30,36.70 mg L^(−1),and 2×10^(−3),*** DBHQ method was validated using atomic absorption spectroscopy,and the recovery percentage was more than 98%.These results indicate that DBHQ can be effectively used for monitoring Cd^(2+)in aqueous *** method developed was further employed for monitoring Cd^(2+)adsorption on calcium alginate(AL)*** adsorption studies were done to optimize parameters of Cd^(2+)removal using AL hydrogels,and the data obtained were used for kinetic and thermodynamic *** studies indicated that the pseudo-first-order model showed better fitting,and thermodynamic studies showed Freundlich-like *** maximum adsorption capacity of Cd^(2+)on AL hydrogels was found to be 56.45 mg g^(−1).The validation studies of DBHQ were performed using statistical analysis methods like t-tests and one-way variance.

关键词： cadmium toxicity 5 7-dibromo-8-hydroxyquinoline spectrophotometric method adsorption studies wastewater remediation calcium alginate hydrogels

THE STUDY ON DETERMINATION OF SELENIUM WITH POTASSIUM BUTYL XANTHATE

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Journal of Northeast Forestry University 1996年第2期7卷 52-55页

作者：孙吉虹袁晓颖 Northeast Forestry University China

A simple and fast ultraviolet spectrophotometric method was used to determineselenium (Ⅳ) through the formation, separaion and quantitative determination of potassium butylxanthae -selenium complex. The complex absorbed light sharply at 375 nm. The optimum acidity ofthe complex formation was between pH 3.4 - 4.0. The absorption value was no change in 120 minutesafter the comlex was extracted by Carbon tetraChioride. The sensitivity of the colour reation was 0.2ng cm-2, The content of selenimp (Ⅳ) was within 0-30 μg and linear rclation was good,Y=0.07X＋0.025, relevent coefficient r＝0.9997. A great quantity of I, Cu, Co, the and SO4-2, PO4-3contained in .the Sample had no effect on the results ofdetenninion when seldsum was *** content of Fe was over l00gμg/ml and Zn was over 180μg/ml, there was diotance to the determination, but the disturbance was rem0ved by adding EDTA. When making use of the method todetermine containin seldsum additivef Cv =6.85, rate of recovery was 97.2%, wild jujubef;Cv=3.22,rate of recovery was 90. 1%, soil Samlef Cv=4.64, rate of recovery was 86.2%. The method for sensitivity measured was apprtoate to 2, 3-diamino naphthalene (DAN) fluorescence method.

关键词： Selenium selenium butyl xanthate spectrophotometric method

Synthesis of Different Ligand Complex Mo (VI) with Stillbazo and Cetylpyridinium Chloride

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Journal of Materials Science and Chemical Engineering 2021年第12期9卷 7-12页

作者： Shahin M. Bayramov Aydin M. Pashajanov Melek M. Agamaliyeva Gulu G. Abbasova Zumrud A. Mamedova Institute of Catalysis and Inorganic Chemistry Named after Acad. M. Nagiev National Academy of Sciences of Azerbaijan Baku Azerbaijan

The complex of molybdenum (VI) with stilbene-2,2’-disulfonic acid-4,4’’bis (azo-1’’)-3’’, 4’’ dioxybenzene (stillbazo) in the presence of a cationic surfactant cetylpyridinium chloride (CPCl) was studied spectrophotometrically. It was found that in the presence of CPCl, a mixed-ligand complex with a component ratio of 1:2:4 is formed. The effect of pH, time, temperature, the concentration of reagents, and CPCl in the formation of homogeneous ligand and mixed-ligand complexes were studied. The stability constants (lgβk = 86 × 108) and the molar absorption coefficient of the mixed-ligand complex (εк = 11,835) were determined. It was found that Beer’s law is observed at a concentration of 0.05 - 17.00 μg/ml. A method has been developed for the spectrophotometric determination of molybdenum (VI) in complex industrial facilities.

关键词： Molybdenum Stillbazo Surfactant spectrophotometric method

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PAN－S为显色剂测定铝合金中铁

冶金分析 1994年第5期 46-48页

作者：罗川南魏琴山东建材学院应化系

ＰＡＮ－Ｓ为显色剂测定铝合金中铁罗川南，魏琴（山东建材学院应化系，济南，２５００２２）铝合金中铁的测定方法中，常用的是硫氰酸盐法，但此方法灵敏度较低，体系稳定性较差。近几年来，人们也发现和合成了许多灵敏度、选择性均较... 详细信息

ＰＡＮ－Ｓ为显色剂测定铝合金中铁罗川南，魏琴（山东建材学院应化系，济南，２５００２２）铝合金中铁的测定方法中，常用的是硫氰酸盐法，但此方法灵敏度较低，体系稳定性较差。近几年来，人们也发现和合成了许多灵敏度、选择性均较高的测铁的新显色剂，如５－Ｂｒ－Ｐ...

关键词： spectrophotometric method Absorbancy Matbematical treatment