Carbon Nanoparticle Spectrophotometric Determination of Glucose

2013 ◽  
Vol 726-731 ◽  
pp. 1453-1456
Author(s):  
Ai Hui Liang ◽  
Jing Peng ◽  
Yuan Li ◽  
Ling Ling Ye ◽  
Gui Qing Wen
Keyword(s):  
Linear Relationship ◽  
Spectrophotometric Determination ◽  
Glucose Concentration ◽  
Carbon Nanoparticles ◽  
Absorption Peak ◽  
Carbon Nanoparticle ◽  
Good Linear ◽  
Good Linear Relationship ◽  
Glucose Injection

In the presence of NaOH, glucose hydrolyze and polymerize to generate yellow carbon nanoparticles that had an absorption peak at 336 nm. Under the selected conditions, result showed the concentration of glucose have a good linear relationship between absorbance value and glucose concentration in the range of 0.0005-0.060 mol/L. This method has been used for the assay of glucose injection sample, with simplicity, rapidity, and accuracy.

Determination of Chitosan Oligosaccharide Content by Acetylacetone Spectrophotometry Method

2012 ◽  
Vol 503-504 ◽  
pp. 543-547 ◽  
Author(s):  
Ze Ping Xu ◽  
Chuan Lun Yang ◽  
Xin Qing Zhang ◽  
Xiu Zhi Wang ◽  
Bao Sheng Huang
Keyword(s):  
Hydrochloric Acid ◽  
Linear Relationship ◽  
Regression Equation ◽  
Common Method ◽  
Chitosan Oligosaccharide ◽  
Average Recovery ◽  
Good Linear ◽  
Good Linear Relationship

Objective: To establish a common method to detect the content of chitosan oligosaccharide. Methods: Chitosan oligosaccharide was hydrolyzed completely by concentrated hydrochloric acid, and the solution was regulated into neutral with NaOH. Then, determined the absorbance in 525nm, and substituted into the regression equation to determine the results. Results: The results showed there was a good linear relationship when the concentration of chitosan oligosaccharide ranged from 0.02 mg/mL to 0.12 mg/mL, r2 = 0.999. The average recovery of chitosan oligosaccharide samples was 99.25%. Conclusion: The method is sensitive, accurate and simple. It is applied to determine of the content of chitosan oligosaccharide.

Determination of Boron in Water Samples by the Spectrophotometric Curcumin Method

2013 ◽  
Vol 807-809 ◽  
pp. 323-326
Author(s):  
Ying Qin
Keyword(s):  
Linear Relationship ◽  
Water Samples ◽  
Yellow River ◽  
The Yellow River ◽  
Good Linear ◽  
Good Linear Relationship

The boron concentrations in water samples from the Yellow River and a reservoir were measured by the spectrophotometric curcumin method. Results show that there is a good linear relationship between the absorbance and the concentration (R2=0.9991). The sensitivity of this method was 0.029 µg, and the precision is 2.05%~5.41%. For different treatments of solutions, the recovery of added boron was in the range of 96.3 to 106.2%. This method is sensitive, accurate, reproducible and easy to be operated.

Spectrophotometric Determination of Isoniazid in Pharmaceutical Sample by Silicomolybdenum Blue

2014 ◽  
Vol 1033-1034 ◽  
pp. 548-551
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Linear Regression ◽  
Linear Relationship ◽  
Spectrophotometric Determination ◽  
Linear Correlation ◽  
Effect Factors ◽  
Reaction Conditions ◽  
Pharmaceutical Sample ◽  
Novel Method ◽  
Maximum Absorption Wavelength

A novel method for the spectrophotometric determination of isoniazid by silicomoly- bdenum blue has been established.The various effect factors on the spectrophotometric determination of isoniazid by silicomolybdenum blue were investigated in detail.The results showed that under certain reaction conditions,silicomolybdenum yellow could be reduced to silicomolybdenum blue by isoniazid, and the content of isoniazid was determinated indirectly through determinating the absorbance of the silicomolybdenum blue. The maximum absorption wavelength of chromogenic system is 740 nm, good linear relationship is obtained between the absorbance and the concentration of isoniazid in the range of 1.968～27.55 μg/mL,and the equation of the linear regression is A=0.0247+61.824ρ (μg/mL) with a linear correlation coefficient is 0.9995.This proposed method has been successfully applied to determinate of isoniazid in isoniazid tablets, and the results agree well with those obtained by pharmacopoeial method.

Research on the Physical Characteristics in Maize Deep-Bed Drying Process

2011 ◽  
Vol 314-316 ◽  
pp. 1478-1482
Author(s):  
Ye Zhang ◽  
Chang You Li ◽  
Zhi Wei Mai ◽  
Feng Ying Xu ◽  
Li Xu
Keyword(s):  
Linear Relationship ◽  
Pressure Loss ◽  
Static Pressure ◽  
Physical Characteristics ◽  
Test Stand ◽  
Thermal Engineering ◽  
Drying Process ◽  
Good Linear ◽  
Good Linear Relationship ◽  
The Relationship

In order to investigate the static pressure loss of the maize deep-bed drying related to the ratio of air flux to grain mass, the experiments based on the theory of thermal engineering and deep-bed drying were engaged in. These experiments conducted on the ventilation test stand indicate the relationship between static pressure loss, depth of the bed, ventilative dimensions and the ratio of air flux to grain mass. The investigation results that during the drying, the static pressure loss increases related to the increased ratio of air flux to grain mass with the constant bed depth. The good linear relationship between the static pressure loss and ventilative dimensions was indicated. With the control of the constant ventilative dimensions, the static pressure loss increases related to the decreased ratio of air flux to grain mass and it will dramatically increased when the ratio of air flux to grain mass is small enough. To reduce the static pressure loss, enlarging the ventilative dimensions, reducing the thickness of the drying layer and reducing the speed of the wind will be the proper methods.

Spectrophotometric determination of peroxymonosulfate anions via oxidative decolorization of dyes induced by cobalt

2016 ◽  
Vol 8 (5) ◽  
pp. 973-978 ◽  
Author(s):  
J. Q. Zhang ◽  
J. Ma ◽  
J. Zou ◽  
H. Z. Chi ◽  
Y. Song
Keyword(s):  
Spectrophotometric Determination ◽  
Maximum Absorption ◽  
Optimum Conditions ◽  
Good Linear ◽  
Linear Correlations ◽  
Decolorization Of Dyes

Dyes can be decolorized by the activation of peroxymonosulfate (PMS) in the presence of cobalt, and four good linear correlations between the depletion of dyes at their maximum absorption wavelengths and the concentration of PMS are demonstrated under the optimum conditions.

scholarly journals Evaluation of Yogurt Quality during Storage by Fluorescence Spectroscopy

2019 ◽  
Vol 9 (1) ◽  
pp. 131
Author(s):  
Haifeng Sun ◽  
Ling Wang ◽  
Hao Zhang ◽  
Ang Wu ◽  
Juanhua Zhu ◽  
...  
Keyword(s):  
Linear Relationship ◽  
Fluorescence Spectra ◽  
Ph Value ◽  
Average Rate ◽  
Ambient Air ◽  
Rate Of Change ◽  
Fluorescence Signal ◽  
Good Linear ◽  
Good Linear Relationship

The physico-chemical parameters including pH and viscosity, and the fluorescence signal induced by fluorescent compounds presenting in yogurts such as riboflavin and porphyrin were measured during one week’s storage at room temperature when five brands of yogurt samples were exposed to ambient air. The fluorescence spectra of yogurt showed four evident emission peaks, 525 nm, 633 nm, 661 nm, and 672 nm. To quantitatively investigate the quality of yogurt during deteriorating, a calculating method of the average rate of change (ARC) was proposed to study the relative change of fluorescence intensity in the spectral range of 600 to 750 nm associated with porphyrin and chlorin compounds. During the storage, the time evolution of two ARC, pH value, and viscosity were regular. Moreover, the ARC showed a good linear relationship with pH value and viscosity of yogurt. Further, multiple linear regression (MLR) models using two ARC as independent variables were developed to verify the dependence of fluorescence signal with pH value and viscosity, which showed a good linear relationship with an R-square of more than 85% for each class of yogurt. The results demonstrate that fluorescence spectra have a great potential to predict the quality of yogurt.

A novel electrochemical sensor based on carbon nanoparticle composite films for the determination of nitrite and hydrogen peroxide

2016 ◽  
Vol 8 (21) ◽  
pp. 4204-4210 ◽  
Author(s):  
Shufang Li ◽  
Jianying Qu ◽  
Yong Wang ◽  
Jianhang Qu ◽  
Huijuan Wang
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Peroxide ◽  
Electrochemical Sensor ◽  
Carbon Nanoparticles ◽  
Room Temperature ◽  
Composite Films ◽  
Carbon Nanoparticle ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Carbon nanoparticles (CNs) were successfully synthesized at room temperature, which were used to construct a novel electrochemical sensor combined with multi-walled carbon nanotubes and chitosan.

Studies of the measurement and interpretation of potato sprout growth

1978 ◽  
Vol 90 (2) ◽  
pp. 335-340 ◽  
Author(s):  
D. C. E. Wurr
Keyword(s):  
Linear Relationship ◽  
Field Performance ◽  
Tuber Weight ◽  
Potato Tubers ◽  
Good Linear ◽  
Potato Sprout ◽  
Good Linear Relationship ◽  
Sprout Length ◽  
The Relationship ◽  
Sprout Growth

SummaryTotal sprout length and the length of the longest sprout were shown to be the most universally useful measurements to estimate sprout development in batches of potato tubers. A good estimate of sprout weight was also derived from measurements of total sprout length. There was a good linear relationship between total sprout length and initial tuber weight but the relationship varied considerably with the time of measurement and the temperature of storage.It is suggested that if sprout measurements are to be used to predict the field performance of a batch of tubers the changing pattern of sprout vigour with time needs to be more closely understood.

Intact Loess Structural Loss Parameter in Humidification Process

2013 ◽  
Vol 655-657 ◽  
pp. 1868-1873
Author(s):  
Xi Chen ◽  
Bin Bin Chen
Keyword(s):  
Linear Relationship ◽  
Water Content ◽  
Good Linear ◽  
Good Linear Relationship ◽  
Loss Parameter ◽  
Structural Loss ◽  
Set Up ◽  
Intact Loess

Based on soil structural view, the mechanism of loess structure is analyzed in humidification process. The concept of the loess structure loss is proposed.And quantitatively parameter described the loess structure loss is set up, that is structure loss parameter. And then the influence laws of humidification and loading on loess structure loss are discussed. The results show that structure loss parameters is increasing with the increase of the humidification water content. The moistening collapsibility has a good linear relationship with loess structure loss parameters.

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