Determination of strontium at low concentration levels by flame atomic absorption spectrometry associated on-line with continuous coprecipitation preconcentration

Lin, Soulin; Zheng, Chunsung; Zu, Houjin

doi:10.1016/0039-9140(95)01555-p

Cited by 10 publications

(2 citation statements)

References 10 publications

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“…At present, identification technologies for metal elements mainly include the chemical inspection method 1 , the mass spectrometry (MS) 2 , the atomic absorption spectrometry (AAS) 3 , and the inductively coupled plasma emission spectrometry (ICP-AES) 4 , etc. These methods have reliable metal element detection capabilities, but also have certain limitations in terms of operation process, detection efficiency, and measurement environment 5 .…”

Section: Introductionmentioning

confidence: 99%

A hybrid approach for metal element identification by using laser-induced breakdown spectroscopy data

Zeng

Zhang

2023

Earth and Space: From Infrared to Terahertz (ESIT 2022)

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Recycling scrap metal is an important way to protect the ecological environment. Design effective yet efficient techniques to automatically identify recyclable scrap metals is an important task within this topic. Due to the advantages of fast response and high accuracy, laser-induced breakdown spectroscopy (LIBS) recently played an important role in the mineral identification. However, the identification accuracy of peak-seeking is greatly affected by the data quality of the LIBS spectrum, whereas machine learning methods may be greatly affected by the number of training data. By considering the above open issues, this paper proposes a hybrid algorithm based on support vector machine (SVM) and element peak-seeking. By investing the identified difference of the major element (with the largest composition in the alloy) and the general element (with composition more than 1% in the alloy) between peak-seeking and SVM, three integration types (i.e., rejection, partial acceptance, complete acceptance) are defined. The final recognition result is generated according to different integration types and the corresponding integration methods. To verify the feasibility of the proposed approach, a simulated alloy LIBS database was established based on 31 metal elements and the simulated alloy LIBS data according to their compositions. Comparing with the result obtained by only using SVM, the proposed method greatly improved the recognition accuracy. The accuracy of identifying all general elements increased from 8% to 74.5%. Experimental results confirmed the effectiveness of the proposed method in identification of general metal elements in terms of higher detection accuracy.

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Section: Introductionmentioning

confidence: 99%

A hybrid approach for metal element identification by using laser-induced breakdown spectroscopy data

Zeng

Zhang

2023

Earth and Space: From Infrared to Terahertz (ESIT 2022)

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“…The precipitate was dissolved in hydrochloric acid and lanthanum was added. Recently, Lin and co-workers [16] have reported a continuous co-precipitation dissolution procedure for the determination of strontium in silicate rocks. In this method, samples were dissolved by hydrofluoric/perchloric/hydrochloric acid and followed by the co-precipitation of strontium with lead sulphate with dissolution in hot EDTA.…”

Section: Introductionmentioning

confidence: 99%

Determination of calcium, magnesium and strontium in soils by flow injection flame atomic absorption spectrometry

Arslan

1999

Talanta

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Several procedures for the determination of Ca, Mg and Sr in soils have been compared on the basis of the accuracy of analysis of two NIST reference materials (Montana Soils SRM 2710 and SRM 2711). Samples were dissolved in a mixture of hydrofluoric and nitric a cids i n s ealed vessels i n a microwave oven and i n teflon beakers on a hot plate. The digests obtained from both dissolution methods were evaporated to dryness in an attempt to remove silicon. Boric acid was added to prevent the precipitation of the lanthanum releasing agent (as lanthanum fluoride) and potassium was added as an ionization buffer. Determinations were made by flame atomic absorption spectrometry with both the nitrous oxide -acetylene flame a nd t he a ir-acetylene fl ame, wi th ca libration ei ther by standard additions or against external standards matrix matched with respect to nitric acid, boric acid, lanthanum and potassium. The silicon remaining in the solution was also determined by external calibration. A single-line flow injection manifold was used to overcome any problems due to the presence of high dissolved solids. A volume of 300 ml was injected into a water carrier stream flowing at 8 ml min − 1 . To determine Ca in the air-acetylene flame, it was necessary to remove silicon. Magnesium was determined in either flame w ithout c omplete r emoval o f t he silicon, however, for the determination of Sr, it was necessary to remove the silicon and use the nitrous oxide-acetylene flame. The indicative value for Sr in SRM 2710 was too low: the value determined was 360 930 mgg −1.

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The role of TiO2 powder on the SrTiO3-based synthesized varistor materials

Luo

Alim

2006

Materials Letters

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Determination of strontium at low concentration levels by flame atomic absorption spectrometry associated on-line with continuous coprecipitation preconcentration

Cited by 10 publications

References 10 publications

A hybrid approach for metal element identification by using laser-induced breakdown spectroscopy data

A hybrid approach for metal element identification by using laser-induced breakdown spectroscopy data

Determination of calcium, magnesium and strontium in soils by flow injection flame atomic absorption spectrometry

The role of TiO2 powder on the SrTiO3-based synthesized varistor materials

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