Rapid, direct determination of strontium in natural waters by laser-induced breakdown spectroscopy

Abstract

We report a LIBS technique for Sr determination in different types of natural waters, which provides sufficient sensitivity for strontium quantification in marine studies, and for the safety control of drinking waters.

Vortex‐assisted liquid–liquid microextraction of strontium from water samples using 4′,4″(5″)‐di‐(tert‐butylcyclohexano)‐18‐crown‐6 and tetraphenylborate

“…The results are listed in Table 1. The concentration of strontium in the seawater was measured to be 5.94 ± 0.12 mg/L, which is close to that observed in Laptev Sea [41]. This result was further confirmed by ICP-MS method within 4% difference to the IC value.…”

“…A comparison of various methods for strontium determination is listed in Table . Based on IC system, the present method exhibits high sensitivity and is especially appropriate for the determination of trace levels of strontium in water samples.…”

“…This result was further confirmed by ICP-MS method within 4% difference to the IC value. A comparison of various methods for strontium determination is listed in Table 2 [8,[41][42][43][44][45][46][47]. Based on IC system, the present method exhibits high sensitivity and is especially appropriate for the determination of trace levels of strontium in water samples.…”

Melted Paraffin Wax as an Innovative Liquid and Solid Extractant for Elemental Analysis by Laser-Induced Breakdown Spectroscopy

“…The analytical methods, which allow a multielement analysis with a simple sample preparation step, are currently exploited by using laser-induced breakdown spectroscopy (LIBS) for solid, liquid, and gas samples analysis. − LIBS uses pulsed laser energy (typically tens to hundreds of millijoules per pulse) for ablation and generation of plasma as excitation source which vaporizes a small amount of the sample (10–300 μg) . Spectra emitted are used for the identification and quantification of excited species from the sample. ,− Despite its simplicity and versatility, the low amount of sample mass ablated by LIBS analysis can result in low detectability and precision, sometimes seen as inappropriate for quantitative applications. , Numerous methods have been developed to perform elemental analysis using LIBS in solid samples, , but a few methods propose the use of this technique in liquid samples. − The direct analysis of liquid samples by LIBS presents some challenges, including low analytical signal intensity, since part of laser energy is used to vaporize the solvent and splashing occurrence on the liquid surface; both phenomena can affect the results’ representativeness …”

Spectroscopic investigation of plasma evolution induced by double pulse laser in distilled water

“…Angel et al (2016) investigated the use of double-pulse LIBS underwater using seawater. Popov et al (2016) reported the salinity effect of different types of natural water, i.e. fresh and seawater as well as mineral water, on the plasma parameters to optimize the experimental conditions.…”