Highly sensitive method for concentration and absorption measurements by guided-wave resonance

2000 ◽  
Author(s):  
Guang Chen ◽  
Yi Jiang ◽  
Zhuangqi Cao ◽  
Qishun Shen ◽  
Xiaoming Dou ◽  
...  
Keyword(s):  
Guided Wave ◽  
Wave Resonance ◽  
Highly Sensitive ◽  
Sensitive Method ◽  
Absorption Measurements

Smartphone Based Highly Sensitive Visualized Detection of Acid Phosphatase Enzyme Activity

2021 ◽  
Author(s):  
Rui Li ◽  
Yanan Sun ◽  
Lihua Jin ◽  
Xiaohong Qiao ◽  
Cong Li ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Acid Phosphatase ◽  
Point Of Care ◽  
Rapid Development ◽  
Practical Application ◽  
Fast Analysis ◽  
Highly Sensitive ◽  
Visualized Detection ◽  
Sensitive Method ◽  
Phosphatase Enzyme

With the rapid development of point-of-care (POC) technologies, the improvement of sensitive method featured with fast analysis and affordable devices has become an emerging requirement for the practical application. In...

Highly sensitive method for aldehydes detection: Application to furfurals analysis in raisin and bovine milk powder

2017 ◽  
Vol 987 ◽  
pp. 47-55 ◽  
Author(s):  
Yao Sun ◽  
Zhaobing Guan ◽  
Hongwei Cai ◽  
Yiyong Huang ◽  
Yawei Lin ◽  
...  
Keyword(s):  
Bovine Milk ◽  
Milk Powder ◽  
Highly Sensitive ◽  
Sensitive Method

scholarly journals 19F NMR Spectroscopy as a Highly Sensitive Method for the Direct Monitoring of Confined Crystallization within Nanoporous Materials

2016 ◽  
Vol 55 (31) ◽  
pp. 8904-8908 ◽  
Author(s):  
Karol P. Nartowski ◽  
Diksha Malhotra ◽  
Lucy E. Hawarden ◽  
Juraj Sibik ◽  
Dinu Iuga ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Nanoporous Materials ◽  
19F Nmr ◽  
19F Nmr Spectroscopy ◽  
Confined Crystallization ◽  
Highly Sensitive ◽  
Sensitive Method

scholarly journals Bloch Surface Wave Resonance Based Sensors as an Alternative to Surface Plasmon Resonance Sensors

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5119 ◽  
Author(s):  
Michal Gryga ◽  
Dalibor Ciprian ◽  
Petr Hlubina
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Wave ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Moist Air ◽  
Polarized Waves ◽  
Wave Resonance ◽  
Highly Sensitive ◽  
Bloch Surface Wave ◽  
Spr Effect

We report on a highly sensitive measurement of the relative humidity (RH) of moist air using both the surface plasmon resonance (SPR) and Bloch surface wave resonance (BSWR). Both resonances are resolved in the Kretschmann configuration when the wavelength interrogation method is utilized. The SPR is revealed for a multilayer plasmonic structure of SF10/Cr/Au, while the BSWR is resolved for a multilayer dielectric structure (MDS) comprising four bilayers of TiO2/SiO2 with a rough termination layer of TiO2. The SPR effect is manifested by a dip in the reflectance of a p-polarized wave, and a shift of the dip with the change in the RH, or equivalently with the change in the refractive index of moist air is revealed, giving a sensitivity in a range of 0.042–0.072 nm/%RH. The BSWR effect is manifested by a dip in the reflectance of the spectral interference of s- and p-polarized waves, which represents an effective approach in resolving the resonance with maximum depth. For the MDS under study, the BSWRs were resolved within two band gaps, and for moist air we obtained sensitivities of 0.021–0.038 nm/%RH and 0.046–0.065 nm/%RH, respectively. We also revealed that the SPR based RH measurement is with the figure of merit (FOM) up to 4.7 × 10−4 %RH−1, while BSWR based measurements have FOMs as high as 3.0 × 10−3 %RH−1 and 1.1 × 10−3 %RH−1, respectively. The obtained spectral interferometry based results demonstrate that the BSWR based sensor employing the available MDS has a similar sensitivity as the SPR based sensor, but outperforms it in the FOM. BSW based sensors employing dielectrics thus represent an effective alternative with a number of advantages, including better mechanical and chemical stability than metal films used in SPR sensing.

scholarly journals Newly Developed Highly Sensitive Method for the Determination of Capecitabine by Using UV-Spectroscopy

2019 ◽  
Vol 11 (03) ◽  
Author(s):  
Manas Ranjan Mishra ◽  
Punam Agrawal ◽  
Surya Narayan Das
Keyword(s):  
Colon Cancer ◽  
Uv Spectroscopy ◽  
First Line ◽  
Spectrophotometric Methods ◽  
Advanced Colon Cancer ◽  
Ich Guidelines ◽  
Highly Sensitive ◽  
Solvent Systems ◽  
Sensitive Method

Capecitabine is a 'pro-drug' to the cytotoxic agent 5-fluorouracil (5-FU) intended to administered orally. Capecitabine is generally used as first line monotherapy for advanced colon cancer. Simple, rapid, accurate UV spectrophotometric methods were developed in the present study and validated for the estimation of Capecitabine in bulk and its formulations as per ICH guidelines. Three solvent systems viz., 0.1N NaOH, 0.1N HCl and Methanol: Water (1:3) was tried. The results suggest that the developed method shows linearity over the range of concentration 2-24μg/ml and a correlation coefficient of 0.9999. Accuracy, precision, linearity, robustness, and ruggedness were statistically validated as per ICH guidelines for all the developed methods. The % RSD values for validated methods were found to be less than 1.5 and methods will find application in routine analysis of drug formulations containing Capecitabine.

Sign in / Sign up

Export Citation Format

Share Document