Highly sensitive determination of dissolved ultra-trace phosphorus by ICP–MS with methane mixed plasma

2021 ◽  
Author(s):  
Ying Zhang ◽  
Jianguo Qu ◽  
Yan Chang ◽  
Yue Li
Keyword(s):  
Icp Ms ◽  
Highly Sensitive ◽  
Low Phosphorus ◽  
Sensitive Determination ◽  
Ultra Trace ◽  
Phosphomolybdenum Blue

Phosphorus concentrations in water are usually determined using phosphomolybdenum blue (PMB) spectrophotometric. However, the measurement of extremely low phosphorus concentrations by this method is limited for various reasons, making it...

Cross Double Point Discharge as Enhanced Excitation Source for Highly Sensitive Determination of Arsenic, Mercury and Lead by Optical Emission Spectrometry

2021 ◽  
Author(s):  
Lin He ◽  
Peixia Li ◽  
Kai Li ◽  
Tao Lin ◽  
Jin Luo ◽  
...  
Keyword(s):  
Double Point ◽  
Hydride Generation ◽  
Optical Emission ◽  
Sample Introduction ◽  
Excitation Source ◽  
Emission Spectrometry ◽  
Highly Sensitive ◽  
Point Discharge ◽  
Sensitive Determination

A new cross double point discharge (CrossPD) microplasma was designed as an excitation source to construct a miniaturized optical emission spectrometer with hydride generation (HG) for sample introduction. The CrossPD...

scholarly journals Immobilization of Pseudomonas aeruginosa static biomass on eggshell powder for on-line preconcentration and determination of Cr (VI)

2020 ◽  
Vol 18 (1) ◽  
pp. 303-313 ◽  
Author(s):  
Aamir Rasheed ◽  
Tahseen Ghous ◽  
Sumaira Mumtaz ◽  
Muhammad Nadeem Zafar ◽  
Kalsoom Akhter ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Low Cost ◽  
Colorimetric Detection ◽  
Time Flow ◽  
Highly Sensitive ◽  
Glass Column ◽  
On Line ◽  
Preconcentration Time ◽  
Ultra Trace

AbstractIn the present work, a novel continuous flow system (CFS) is developed for the preconcentration and determination of Cr (VI) using Pseudomonas aeruginosa static biomass immobilized onto an effective and low-cost solid support of powdered eggshells. A mini glass column packed with the immobilized biosorbent is incorporated in a CFS for the preconcentration and determination of Cr (VI) from aqueous solutions. The method is based on preconcentration, washing and elution steps followed by colorimetric detection with 1,5-diphenyl carbazide in sulphuric acid. The effects of several variables such as pH, retention time, flow rate, eluent concentration and loaded volume are studied. Under optimal conditions, the CFS method has a linear range between 10 and 100 μg L-1 and a detection limit of 6.25 μg L-1 for the determination of Cr (VI). The sampling frequency is 10 samples per hour with a preconcentration time of 5 mins. Furthermore, after washing with a 0.1 M buffer (pH 3.0), the activity of the biosorbent is regenerated and remained comparable for more than 200 cycles. Scanning electron microscopy reveals a successful immobilization of biomass on eggshells powder and precipitation of Cr (VI) on the bacterial cell surface. The proposed method proves highly sensitive and could be suitable for the determination of Cr (VI) at an ultra-trace level.

Aunano/Fe-MOF hybrid electrode for highly sensitive determination of trace As(III)

2021 ◽  
pp. 115642
Author(s):  
Xiaoyuan Zhu ◽  
Guodong Zhu ◽  
Yuanxin Ge ◽  
Boshuang Zhang ◽  
Jianmao Yang ◽  
...  
Keyword(s):  
Highly Sensitive ◽  
Sensitive Determination

Highly sensitive determination of the methylated p16 gene in cancer patients by microchip electrophoresis

2005 ◽  
Vol 816 (1-2) ◽  
pp. 145-151 ◽  
Author(s):  
Xiao-Mian Zhou ◽  
Shu-Juan Shao ◽  
Guan-Dong Xu ◽  
Run-Tao Zhong ◽  
Da-Yu Liu ◽  
...  
Keyword(s):  
Cancer Patients ◽  
Microchip Electrophoresis ◽  
P16 Gene ◽  
Highly Sensitive ◽  
Sensitive Determination
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