scholarly journals Rapid modified QuEChERS method for pesticides detection in honey by high-performance liquid chromatography UV-visible

2014 ◽  
Vol 3 (2) ◽  
Author(s):  
Elisabetta Bonerba ◽  
Edmondo Ceci ◽  
Nicola Montemurro ◽  
Giuseppina Tantillo ◽  
Angela Di Pinto ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Quechers Method ◽  
Modified Quechers ◽  
Uv Visible

scholarly journals Analysis of crotonaldehyde puff-by-puff release in mainstream cigarette smoke under various smoking regimens by high-performance liquid chromatography with the modified QuEChERS method

2018 ◽  
Vol 5 (6) ◽  
pp. 172003
Author(s):  
Chao Li ◽  
E'xian Li ◽  
Jian Zhang ◽  
Ying Tao ◽  
Chengming Zhang ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Cigarette Smoke ◽  
High Performance ◽  
Sample Pretreatment ◽  
International Organization ◽  
Quechers Method ◽  
Modified Quechers ◽  
Health Canada ◽  
Mainstream Cigarette Smoke

To study puff-by-puff release characteristics of crotonaldehyde in mainstream cigarette smoke under diverse intensive smoking regimens, we designed an RM20H smoking machine with a puff-by-puff smoke collection unit to automatically trap crotonaldehyde in the mainstream cigarette smoke. Using this process, we trapped, puff-by-puff, crotonaldehyde in mainstream smoke generated by different smoking regimens and quantitatively analysed the levels of crotonaldehyde using high-performance liquid chromatography with a modified QuEChERS sample pretreatment method. On the basis of the crotonaldehyde in each puff, we determined crotonaldehyde's puff-by-puff release characteristics. The results showed that crotonaldehyde's puff-by-puff release remained nearly constant for the International Organization for Standardization mode while increased polynomial trend was seen ( n  ≥ 6) under the Massachusetts and Health Canada smoking regimens. The equation fit for various regimens was good ( R 2  > 0.9192). Release characteristics by puff were classified into four categories: (1) first, second and third puffs; (2) fourth and fifth puffs; (3) sixth puff; and (4) seventh and eighth puffs.

Determination of pesticide residues in coconut tree trunks by modified QuEChERS method and ultra-high-performance liquid chromatography coupled to triple quadrupole tandem mass spectrometry

2015 ◽  
Vol 7 (10) ◽  
pp. 4237-4245 ◽  
Author(s):  
J. A. Ferreira ◽  
V. Talamine ◽  
J. F. Facco ◽  
T. M. Rizzetti ◽  
J. M. S. Ferreira ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Tandem Mass ◽  
Triple Quadrupole ◽  
Quechers Method ◽  
Coconut Tree ◽  
Modified Quechers

Determination of pesticides in coconut tree trunks using modified QuEChERS and UHPLC-MS/MS.

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