Combination of developed in-house method and application of Eichrom Sr resin to determine the radioactivity of 90Sr in environmental sample

Mahmood, Zal U Yun Wan; Ariffin, Nik Azlin Nik; Ishak, Abdul Kadir; Mohamed, Norfaizal; Yii, Mei-Wo; Ishak, Kamaruzaman; Pa'wan, Zainab

doi:10.1007/s10967-011-1380-8

Cited by 3 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A commercial Sr Resin (Sr⋅Spec resin, Eichrom® Industries) with the crown ether DtBuCH18C6 dissolved in 1‐octanol was developed for strontium separation from nitric acid media . However, the Sr resin is expensive and has a limited lifetime due to the gradual loss of the 1‐octanol phase . It should be noted that the lipophilic nature of counter anions also strongly influences the extraction of strontium.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Chang

Shen

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

A vortex-assisted liquid-liquid microextraction method was developed for the chromatographic determination of strontium in aqueous samples. In the method, strontium was complexed with 4',4″(5″)-di-(tert-butylcyclohexano)-18-crown-6 in the presence of tetraphenylborate as the counter anion, which increased the hydrophobicity of the ion-association complex, resulting in its improved extraction into 1-octanol. Strontium from the organic phase was stripped with nitric acid back to aqueous solution and determined by ion chromatography. The optimum microextraction conditions were as follows: 2.0 mL aqueous samples with 3 mM tetraphenylborate; 150 μL of 1-octanol as the extractant phase with 10 mM DtBuCH18C6; vortex extraction time for 10 s; centrifugation at 6000 rpm for 4 min; stripping by 0.1 M nitric acid. Under the optimum conditions, the detection limit for strontium was 0.005 mg/L. The calibration curves showed good linearity over the range between 0.01 and 2.5 mg/L. Intra- and interday precisions of the present method were satisfactory with relative standard deviations of 1.7 and 2.1%, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Wang

Chang

Shen

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

show abstract

“…Be cause of all these fac tors, stron tium can ac cu mu late in or gan isms through the food chain, be ing pres ent in bi o log i cal sam ples where there is cal cium, such as cow's milk [4,5]. There fore, it is es sen tial to de velop tech niques to de ter mine the ac tiv ity of the stron tium con cen tration in milk sam ples [6][7][8][9], as is the case in the pres ent study. The Com mis sion Rec om men da tion of 8 June 2000 (2000/473/Euratom) sets a warn ing level for 90 Sr of 2•10 -1 BqL -1 in milk.…”

Section: Introductionmentioning

confidence: 99%