Development of a liquid-nitrogen-induced homogeneous liquid–liquid microextraction of Co(II) and Ni(II) from water and fruit juice samples followed by atomic absorption spectrometry detection

Amplified Peroxidase‐like Activity of Co2+ Using 8‐Hydroxyquinoline and Its Application for Ultrasensitive Colorimetric Detection of Clioquinol

“…Cu 2+ exhibits remarkable activity in the absence of HCO 3 − , and 8HQ apparently enhances the activity of Cu 2+ (Figure S8A and C), which is consistent with the reported catalytic activity of Cu 2+ [21] . When Co 2+ coexisted with one of other metal ions (10 μM), low absorbance was resulted from Cu 2+ and Ni 2+ , due to their higher affinity with 8HQ (Figure 3B) [8c,d] . The solubility product constants (K sp ) for Cu(8HQ) 2 , Ni(8HQ) 2 and Co(8HQ) 2 are 2.0×10 −30 , 8×10 −27 and 1.6×10 −25 , respectively [22] .…”

Cold-induced phase separation for the simple and reliable extraction of sex hormones for subsequent LC-MS/MS analysis

“…In other words, an ACN/water-based “in situ LLE” can be well realized through a simple cooling down process. In the past few years, this mechanism (naming as “cold-induced phase separation (CIPS),” “low-temperature-induced phase separation,” “homogeneous liquid-liquid microextraction,” “low-temperature partition,” and others) has been mainly utilized for drug/pesticide-residue analysis in food/environmental science ( 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ). However, its applicability for pretreatment of biotargets remains to be clarified.…”

Selective extraction of apixaban from plasma by dispersive solid‐phase microextraction using magnetic metal organic framework combined with molecularly imprinted polymer nanocomposite

“…Therefore, in recent years, several attempts were made to replace the mentioned routine methods with new and efficient approaches [5]. Up to now, different sample preparation methods like dispersive liquid-liquid microextraction [6], liquid-phase microextraction [7], solid-phase extraction [8,9], solid-phase microextraction [10], magnetic solid-phase extraction [11], liquid-liquid extraction [12,13], and dispersive solid-phase extraction (DSPE) [14,15] were used as the sample preparation methods before drug analysis. Among the mentioned methods, DSPE has some features such as simplicity, easiness, and inexpensiveness.…”