Trace monitoring of silver ions in food and water samples by flame atomic absorption spectrophotometry after preconcentration with solvent-assisted dispersive solid phase extraction

Abstract

In this research, a new sample treatment technique termed solvent-assisted dispersive solid phase extraction (SADSPE) was developed. The new method was based on the dispersion of the sorbent into the sample to maximize the contact surface. In this approach, the dispersion of the sorbent at a very low milligram level was achieved by injecting a mixture solution of the sorbent and disperser solvent into the aqueous sample. Thereby, a cloudy solution formed. The cloudy solution resulted from the dispersion of the fine particles of the sorbent in the bulk aqueous sample. After extraction, the cloudy solution was centrifuged and the enriched analytes in the sediment phase dissolved in ethanol and determined by FAAS. Under the optimized conditions, the detection limit for silver ions was 0.8 μg L(-1). The relative standard deviations for six separate extraction experiments for determination of 5 and 200 μg L(-1) of silver ions was 3.4 and 3.1 %. The preconcentration factor was found to be 61.7. SADSPE was successfully applied for trace determination of silver ions in water and food samples.

Efficient sample preparation method based on solvent-assisted dispersive solid-phase extraction for the trace detection of butachlor in urine and waste water samples

“…and Omidi et al. used SA‐DSPE as an appropriate sample preparation method for trace detection of cadmium, lead, and silver ions by flame atomic absorption spectrometry . This work is the first report on the application of SA‐DSPE for the separation and preconcentration of a target molecule from real samples.…”

“…Solvent-assisted dispersive solid-phase extraction (SA-DSPE) as a new sample preparation method was introduced for the first time by Jamali et al for efficient preconcentration and trace detection of cobalt in food and environmental water samples [26]. In the subsequent application of the method, Behbahani et al and Omidi et al used SA-DSPE as an appropriate sample preparation method for trace detection of cadmium, lead, and silver ions by flame atomic absorption spectrometry [27,28]. This work is the first report on the application of SA-DSPE for the separation and preconcentration of a target molecule from real samples.…”

Nitrogen doped nano porous graphene as a sorbent for separation and preconcentration trace amounts of Pb, Cd and Cr by Ultrasonic assisted in‐syringe dispersive micro solid phase extraction

“…The most recently, many research efforts are towards the development of efficient, miniature, and environment friendly sample preparation methods. To reach this goal, various techniques such as liquid–liquid extraction (LLE), cloud point extraction (CPE), solid phase extraction (SPE), membrane extraction (ME) and stir‐bar sorptive extraction (SBSE) have been applied for separation and preconcentration of heavy metals. Among these methods, solid phase extraction (SPE) is considered more superior in sample preparation due to high preconcentration factor and the consumption of small volume of solvent.…”

Development of a new solvent‐assisted dispersive solid‐phase extraction followed by ion mobility spectrometry for trace determination of organophosphorus pesticides in environmental water samples

“…In this method, each molecule of interest in the solution inter-acts with the fine particles of the sorbent; consequently, they are extracted from the initial solution. Several advantages of SA-DSPE include high preconcentration factor, rapidity, the simplicity of the operation, low cost, low sample volume, and high recovery [16][17][18][19][20][21].…”