Studies on the application of photochemical reactions in a flow injection system. Part 1. Determination of trace amounts of nitrite, based on its inhibitory effect on the photochemical reaction between iodine and ethylenediaminetetraacetic acid

The Analyst ◽  
1991 ◽  
Vol 116 (5) ◽  
pp. 497 ◽  
Author(s):  
Ren-Min Liu ◽  
Dao-Jie Liu
Keyword(s):  
Flow Injection ◽  
Photochemical Reaction ◽  
Ethylenediaminetetraacetic Acid ◽  
Inhibitory Effect ◽  
Photochemical Reactions ◽  
Injection System ◽  
System Part ◽  
Flow Injection System

scholarly journals Determination of Picogram Levels of Roxithromycin in Pharmaceutical, Human Serum, and Urine by Flow-Injection Chemiluminescence

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Jiangman Liu ◽  
Huan Yang ◽  
Yun Zhang ◽  
Min Wu ◽  
Haixiang Zhao ◽  
...  
Keyword(s):  
Human Serum ◽  
Flow Injection ◽  
Limit Of Detection ◽  
Inhibitory Effect ◽  
Injection System ◽  
Relative Standard ◽  
Flow Injection System ◽  
Flow Injection Chemiluminescence ◽  
Serum And Urine

A sensitive chemiluminescence (CL) method, based on the inhibitory effect of roxithromycin (ROX) on the CL reaction between luminol and dissolved oxygen in a flow-injection system, was first proposed for the determination of ROX at picogram levels. The decrement of CL intensity was linearly proportional to the logarithm of ROX concentrations ranging from 0.1 to 100 pg mL-1, giving the limit of detection (LOD) of 0.03 pg mL-1 (3σ). At a flow rate of 2.0 mL min-1, a complete analytical procedure including sampling and washing could be performed within 0.5 min, with relative standard deviations (RSDs) of less than 5.0% (n=5). The proposed procedure was applied successfully to the determination of ROX in pharmaceutical, human serum, and urine with the recoveries ranging from 90.0 to 110.0%.

scholarly journals Determination of Hesperetin in Pericarpium Citri Reticulatae and Human Serum Using Flow Injection Chemiluminescence

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Jiajia Wang ◽  
Xijuan Tan ◽  
Xin Li ◽  
Jiangman Liu ◽  
Zhenghua Song
Keyword(s):  
Dissolved Oxygen ◽  
Human Serum ◽  
Flow Injection ◽  
Inhibitory Effect ◽  
Injection System ◽  
Sampling Efficiency ◽  
Relative Standard ◽  
Flow Injection System ◽  
Flow Injection Chemiluminescence

A sensitive chemiluminescence (CL) method for the determination of hesperetin at nanogram levels was first presented. It was based on the inhibitory effect of hesperetin on luminol-dissolved oxygen CL reaction in a flow injection system. The decrements of CL intensity were logarithm over the concentrations of hesperetin in a range of 0.5 to 1000 ng mL−1, with a detection limit of 0.2 ng mL−1 (3σ) and the relative standard deviations lower than 2.1%. At a flow rate of 2.0 mL min−1, the whole determining performance including sampling and washing could be accomplished in 30 s, giving a sampling efficiency of 120 h−1. The proposed method was applied successfully to the direct hesperetin determination in human serum with recoveries from 97.0 to 106.6%, and indirect hesperidin quantification in 2.5 g pericarpium citri reticulatae showing that the content is 8.1±0.2%. The possible CL mechanism of luminol-dissolved oxygen-hesperetin reaction was also discussed in detail.

Spectrofluorimetric optosensing of aluminium in a flow injection system: determination of aluminium in dialysis fluids and concentrates

The Analyst ◽  
1990 ◽  
Vol 115 (5) ◽  
pp. 575-579 ◽  
Author(s):  
Maria Rosario Pereiro García ◽  
Marta Elena Díaz García ◽  
Alfredo Sanz-Medel
Keyword(s):  
Flow Injection ◽  
Injection System ◽  
Flow Injection System ◽  
Dialysis Fluids
Sign in / Sign up

Export Citation Format

Share Document