scholarly journals Flow injection system with gas diffusion for the sequential determination of total nitrogen and phosphorus in vegetables

1997 ◽  
Vol 358 (5) ◽  
pp. 657-662 ◽  
Author(s):  
Jose� L. F. C. Lima ◽  
Antoacutenio O. S. S. Rangel ◽  
M. Renata S. Souto
Keyword(s):  
Total Nitrogen ◽  
Flow Injection ◽  
Gas Diffusion ◽  
Injection System ◽  
Nitrogen And Phosphorus ◽  
Sequential Determination ◽  
Flow Injection System

Determination of ammonium in marine waters using a gas diffusion multicommuted flow injection system with in-line prevention of metal hydroxidesprecipitation

2009 ◽  
Vol 11 (1) ◽  
pp. 228-234 ◽  
Author(s):  
Sara Melo Oliveira ◽  
Teresa Isabel Marques da Silva Lopes ◽  
Ildikó Vargáné Tóth ◽  
António Osmaro Santos Silva Rangel
Keyword(s):  
Flow Injection ◽  
Gas Diffusion ◽  
Injection System ◽  
Marine Waters ◽  
Flow Injection System

FLOW INJECTION ANALYSIS — ADAPTATION TO A SMALL LABORATORY

1980 ◽  
Vol 60 (2) ◽  
pp. 767-769 ◽  
Author(s):  
N. W. HOLT
Keyword(s):  
Total Nitrogen ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Plant Material ◽  
Injection System ◽  
Small Laboratory ◽  
Nitrogen And Phosphorus ◽  
Flow Injection System

A flow injection system was used to analyze plant material for total nitrogen and phosphorus. A new, inexpensive sample injector was built which enabled the system to be completely automated.

scholarly journals Sequential determination of free and total cyanide by flow injection

1999 ◽  
Vol 21 (1) ◽  
pp. 23-26 ◽  
Author(s):  
Maria Angélica Bonadiman Martin ◽  
Edgard Moreira Ganzarolli ◽  
Arilson Lehmkuhl ◽  
Ivan Gonçlves de Souza ◽  
Roldão Roosevelt Urzêdo de Queiróz
Keyword(s):  
Flow Injection ◽  
Direct Detection ◽  
Chemical Species ◽  
Diffusion Chamber ◽  
Gas Diffusion ◽  
Ion Selective Electrode ◽  
Injection System ◽  
Selective Electrode ◽  
Sequential Determination

This study presents a flow injection system for the sequential determination of free (CN-) and total (CN-+ HCN) cyanide using a potentiometric method which employs two different processes for the determination of these two chemical species. The first process is based on direct detection of CN-using an ion-selective electrode for cyanide. In the second process, the sample is mixed with acid, and the released HCN is transferred across a PTFE membrane. The flow system employs three solenoid valves, a gas diffusion chamber, an ion-selective electrode, a potentiometer, and a computer with an AID conversion card. A Turbo Pascal®computer program automatically performs all the steps involved in data acquisition and processing. The standard deviation for the results obtained with the proposed method was 0.5%.

Determination of ammonium ion in a flow-injection system with a gas-diffusion membrane

1988 ◽  
Vol 208 ◽  
pp. 81-90 ◽  
Author(s):  
Ryuji Nakata ◽  
Takayoshi Kawamura ◽  
Hiroyuki Sakashita ◽  
Akihiko Nitta
Keyword(s):  
Flow Injection ◽  
Gas Diffusion ◽  
Injection System ◽  
Ammonium Ion ◽  
Flow Injection System ◽  
Diffusion Membrane
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