Flow-injection analysis based on a membrane separation module and a bulk acoustic wave impedance sensor - determination of the volatile acidity of fermentation products

1998 ◽  
Vol 360 (2) ◽  
pp. 272-274 ◽  
Author(s):  
Xiaoli Su ◽  
Lihua Nie ◽  
S. Yao
Keyword(s):  
Acoustic Wave ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Membrane Separation ◽  
Wave Impedance ◽  
Bulk Acoustic Wave ◽  
Fermentation Products ◽  
Volatile Acidity ◽  
Impedance Sensor

Rapid Determination of Acid Phosphatase by a Surface Acoustic Wave Impedance Sensor

1996 ◽  
Vol 29 (1) ◽  
pp. 59-72 ◽  
Author(s):  
R. Wang ◽  
Q. Y. Cai ◽  
L. Wu ◽  
L. H. Nie ◽  
S. Z. Yao
Keyword(s):  
Acid Phosphatase ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Rapid Determination ◽  
Wave Impedance ◽  
Impedance Sensor

scholarly journals Flow injection analysis with membrane separation; Determination of ammonia in blood and urine.

1984 ◽  
Vol 33 (10) ◽  
pp. 505-509 ◽  
Author(s):  
Toyoaki AOKI ◽  
Satoshi UEMURA ◽  
Makoto MUNEMORI
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Membrane Separation

scholarly journals Gas Diffusion Flow Injection Analysis with Bulk Acoustic Wave Detection and the Applications for Determining Nitrogen, Carbon, or Sulfite Species in Varieties of Complex Matrixes

1999 ◽  
Vol 82 (6) ◽  
pp. 1479-1487 ◽  
Author(s):  
Shou-Zhuo Yao ◽  
Xiao-Li Su
Keyword(s):  
Acoustic Wave ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Inorganic Nitrogen ◽  
Gas Diffusion ◽  
Total Carbon ◽  
Bulk Acoustic Wave ◽  
Operating Voltage ◽  
Gaseous Species ◽  
Wave Detector

Abstract A new flow injection analysis technique was developed for determining nitrogen, carbon, or sulfite species in varieties of complex matrixes. The method is based on the use of a bulk acoustic wave detector in combination with gas diffusion separation. Samples were injected into a carrier stream of water, merged with a reagent stream of an appropriate pH where the analyte was converted into a gaseous species, and diffused across a Teflon microporous membrane into a recipient stream. Then the trapped ionic compound in the recipient stream was monitored on-line with a bulk acoustic wave detector on the basis of sensitive response to changes of the solution conductance. The method is applied successfully for determining ammonium in Kjeldahl digest obtained from amino acids and blood proteins; total carbon, total inorganic carbon, and total organic carbon in waste and river waters; sulfite in wines and fruit juices; nitrate, nitrite, ammonium, and total inorganic nitrogen in natural waters; and total ammonia and total carbon dioxide in blood. The throughput, detection limit, and precision of the proposed method varied from 20 to 78 samples/h, 1 to 10 μM, and 0.6 to 1.8%, respectively. The method was validated by comparison with conventional procedure such as titration, spectrophotometry, or gas-sensing electrode. Theoretical background, the potential interference, and influencing factors, including composition of the acceptor and donor streams, flow injection parameters, cell constant and operating voltage of the sensor, and temperature are also discussed in detail.

Rapid Determination of Dimethoate with a Surface Acoustic Wave Impedance Sensor System

1997 ◽  
Vol 30 (15) ◽  
pp. 2641-2653 ◽  
Author(s):  
Wei Wei ◽  
Ronghui Wang ◽  
Lihua Nie ◽  
Shouzhuo Yao
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Rapid Determination ◽  
Wave Impedance ◽  
Sensor System ◽  
Impedance Sensor
Sign in / Sign up

Export Citation Format

Share Document