Determination of antipyrine in saliva using the dispersive liquid–liquid microextraction based on a stepwise injection system

A fully automated effervescence assisted dispersive liquid–liquid microextraction based on a stepwise injection system. Determination of antipyrine in saliva samples

“…Previously, it was found that, the rate of derivatization increases with increasing concentration of nitrite ions, and is almost completed within 3 min, with 6 mmol L −1 NaNO 3 , 0.5 mol L −1 H 2 SO 4 , at temperature of 20 ± 5°C, of optimal conditions [23]. Therefore, these conditions were selected as the default for further optimization.…”

“…The data show the proposed method is superior with respect to all key analytical figures of merit. The described method is fully automated and more sensitive [23], since the application of dispersive solvent that can affect the solubility of the analyte in the aqueous phase is avoided.…”

“…Flow based methods can be recognized as a universal tool for automation of a wide variety of analytical procedures, including DLLME [18,19]. Recently, there have been several approaches suggested for the implementation of various DLLME modes in flow systems, based on microcolumn phase separation [20], in-syringe approach [21], coupling with flow-batch sequential injection [22] and stepwise injection [23] systems, as well as, magnetic stirring [24]. However, to the best of our knowledge, the automation of EA-DLLME has not been reported yet.…”

Vapor permeation-stepwise injection simultaneous determination of methanol and ethanol in biodiesel with voltammetric detection

“…The studied membrane has higher free volume, which significantly effects the transport of low molecular substances through it. The stepwise injection analysis [20][21][22] was chosen for the automation of methanol and ethanol determination in biodiesel because its manifold allows to mix solutions by a gas flow. This feature can be used to increase the efficiency of methanol and ethanol penetration during vapor permeation.…”

Determination of curcumin in biologically active supplements and food spices using a mesofluidic platform with fluorescence detection

“…The SWIA [21][22][23][24][25] was chosen for the automation of curcumin determination because it provides high efficiency of mixing sample and reagent solutions. The SWIA manifold is similar to the zone fluidics [26], sequential injection-lab at valve [27] and flow batch [28] manifolds.…”