Sequential determination of multi-nutrient elements in natural water samples with a reverse flow injection system

Talanta ◽  
2017 ◽  
Vol 167 ◽  
pp. 166-171 ◽  
Author(s):  
Kunning Lin ◽  
Jian Ma ◽  
Dongxing Yuan ◽  
Sichao Feng ◽  
Haitao Su ◽  
...  
Keyword(s):  
Flow Injection ◽  
Natural Water ◽  
Water Samples ◽  
Reverse Flow ◽  
Injection System ◽  
Nutrient Elements ◽  
Sequential Determination ◽  
Flow Injection System ◽  
Reverse Flow Injection

scholarly journals DETERMINATION OF NITRAZEPAM IN PHARMACEUTICAL PREPARATIONS USING SOLID-PHASE REACTOR - REVERSE FLOW INJECTION ANALYSIS

2018 ◽  
Vol 11 (7) ◽  
pp. 487
Author(s):  
Mariam Jamal ◽  
Hind Hadi
Keyword(s):  
Flow Injection ◽  
Solid Phase ◽  
Reverse Flow ◽  
Injection System ◽  
Physical Parameters ◽  
Relative Standard ◽  
Solid Phase Reactor ◽  
Oxidation Reactor ◽  
Reverse Flow Injection

Objective: A simple and fast reverse flow injection system including a solid-phase reactor containing PbO2 with spectrophotometric detection was suggested for the determination of nitrazepam (NIT) in pharmaceutical tablets.Methods: The method was based on oxidation of the reagent (phloroglucinol) with PbO2 immobilized in a polymeric matrix which was then coupled with reduced NIT in aqueous medium. The pink-colored product was measured at 530 nm.Results: The calibration graph was linear over the range of 50–400 μg/mL with a relative standard deviation of <2% (n=29) and a sample throughput of 48 samples per hour. The variables of the solid-phase reactor such as composition, particle size, and length of the reactor were studied. The chemical and physical parameters, which affect the reverse flow method, were also studied.Conclusion: The oxidation reactor engaged with a flow system was successfully applied for the determination of NIT with good sensitivity and precision.

Optical fiber reflectance sensor coupled to a multisyringe flow injection system for preconcentration and determination of 1-naphthylamine in water samples

2006 ◽  
Vol 573-574 ◽  
pp. 406-412 ◽  
Author(s):  
J.L. Guzmán Mar ◽  
L. López Martínez ◽  
P.L. López de Alba ◽  
J.E. Castrejón Durán ◽  
V. Cerdà Martín
Keyword(s):  
Optical Fiber ◽  
Flow Injection ◽  
Water Samples ◽  
Injection System ◽  
Flow Injection System
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