Ultra-sensitive determination of cadmium in rice and water by UV–vis spectrophotometry after single drop microextraction

A glance at achievements in the coupling of headspace and direct immersion single‐drop microextraction with chromatographic techniques

“…One can find, however, various modifications of SDME that more or less differ from the above‐described general procedure. Examples of the application the two most commonly used modes of SDME—HS and DI—can be found in the Supporting Information …”

Ionic liquid-based single drop microextraction of ultra-trace copper in food and water samples before spectrophotometric determination

“…To weaken the negative effect, four parallel extractions were simultaneously operated in the process. The experimental assembly as well as procedure was described in our previous work [10]. Considering the poor sensitivity of copper, larger volume of sample solution was used to improve the enhancement factor.…”

“…In our previous research, SDME was investigated for the extraction of cadmium before spectrophotometric determination [10]. As mentioned in that work, most of such studies were focused on organic compounds combined with GC/HPLC, and few works were about the analysis of metal ions.…”

“…This would greatly expand its applications, especially for the less developed area without more advanced analytical instruments. But recently, few works were carried out in this field, except for solvent extraction [16,17], solid phase extraction [18,19], cloud point extraction and surfactant-mediated extraction [20][21][22] In our previous work, dispersive liquid liquid microextraction (DLLME) [23] and single drop microextraction (SDME) [10] were investigated to be combined with ordinary spectrophotometer. In this work, UV-vis spectrophotometry was applied to hyphenate with ionic liquid-based SDME for the determination of copper in water and food samples.…”

Determination of trace amounts of Brown HT as a food dye by a CPE-scanometry method

“…Auxiliary methods, such as ultrasonic-assisted cloud point extraction (UA-CPE) [29], microwave-assisted cloud point extraction (MA-CPE) [30], CPE-SPE [31], CPE assisted by nanoparticles [32], and stirring-assisted cloud point extraction (SA-CPE) [33], are also applicable. CPE has been shown to be an effective procedure for analyte extraction, pre-concentration and purification that improves the sensitivity, selectivity, detection limit and other analytical characteristics prior to HPLC [34], GC [35], CE [36,37], spectroscopy [38,39], inductively coupled plasma (ICP) [40], atomic absorption spectrometry [41,42], spectrophotometry [43], HPLC-UV [13], paptode [25] and solution scanometry [44][45][46].…”