Determination of lead in calcium carbonate by flow-injection hydride generation with dc plasma atomic emission detection

Brindle, Ian D.; McLaughlin, Roger; Tangtreamjitmun, Napa

doi:10.1016/s0584-8547(98)00141-4

Cited by 22 publications

(20 citation statements)

References 20 publications

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“…It is clear that Cu(II) was the only single element that interfered with the formation of PbH 4 in any medium, even in the presence of potassium hexacyanoferrate(III) medium [15,17,43]. The effects were severest in both HNO 3 -H 2 O 2 [16] and HCl-H 2 O 2 [16, 18] such that accuracy was low even in freshwater samples containing part per billion levels of transitions metal ions [16].…”

Section: Resultsmentioning

confidence: 99%

Determination of lead by hydride generation inductively coupled plasma mass spectrometry (HG-ICP-MS): On-line generation of plumbane using potassium hexacyanomanganate(III)

Yılmaz

Arslan

Rose

2013

Analytica Chimica Acta

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A hydride generation (HG) procedure has been described for determination of Pb by ICP-MS using potassium hexacyanomanganate(III), K3Mn(CN)6, as an additive to facilitate the generation of plumbane (PbH4). Potassium hexacyanomanganate(III) was prepared in acidic medium as it was unstable in water. The stability of hexacyanomanganate(III) was examined in dilute solutions of HCl, HNO3 and H2SO4. The solutions prepared in 1% v/v/ H2SO4 were found to be stable for over a period of 24 h. The least suitable medium was 1% v/v HNO3. For generation of plumbane, acidic hexacyanomanganate(III) and sample solutions were mixed online along a 5-cm long tygon tubing (1.14 mm i.d.) and then reacted with 2% m/v sodium borohydride (NaBH4). A concentration of 0.5% m/v K3Mn(CN)6 facilitated the generation of PbH4 remarkably. In comparison to H2SO4, HCl provided broader working range for which optimum concentration was 1% v/v. No significant interferences were noted from transition metals and hydride forming elements, up to 0.5 μg mL−1 levels, except Cu which depressed the signals severely. The depressive effects in the presence of 0.1 μg mL−1 Cu were alleviated by increasing the concentration of K3Mn(CN)6 to 2% m/v. Under these conditions, the sensitivity was enhanced by a factor of at least 42 to 48. The detection limit (3s) was 0.008 μg L−1 for 208Pb isotope. Average signal-to-noise ratio (S/N) ranged between 18 and 20 for 1.0 μg mL−1 Pb solution. The accuracy of the method was verified by analysis of several certified reference materials, including Nearshore seawater (CASS-4), Bone ash (SRM 1400), and Mussel tissue (SRM 2976). The procedure was also successfully applied to the determination of Pb in coastal seawater samples by ICP-MS.

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Section: Resultsmentioning

confidence: 99%

Determination of lead by hydride generation inductively coupled plasma mass spectrometry (HG-ICP-MS): On-line generation of plumbane using potassium hexacyanomanganate(III)

Yılmaz

Arslan

Rose

2013

Analytica Chimica Acta

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“…Better sensitivity was reported by using potassium ferricyanide, K 3 Fe(CN) 6 ), a relatively mild oxidant [15][16][17][18][19][20]. Lead hydride generation with a mixture of potassium ferricyanide and hydrochloric or nitric acid has been successfully applied to the determination of Pb in various samples, including soil and sediments [18,19], calcium matrices [20,21], urine [17], dialysis concentrates [15], geochemical deposits and paint [22].…”

Section: Introductionmentioning

confidence: 99%

Determination of lead in wine and rum samples by flow injection-hydride generation-atomic absorption spectrometry

Elçi

Arslan

Tyson

2009

Journal of Hazardous Materials

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A method for direct determination of lead in wine and rum samples was developed, using a flow injection hydride generation system coupled to an atomic absorption spectrometer with flame-quartz atomizer (FI-HG-AAS). Lead hyride (PbH 4 ) was generated using potassium ferricyanide (K 3 Fe(CN) 6 ), as oxidant and sodium tetrahydroborate (NaBH 4 ) as reductant. Samples were acidified to 0.40% (v/v) HCl for wine and to 0.30% (v/v) HCl for rum, which were then mixed on-line with 3% (m/v) K 3 Fe(CN) 6 solution in 0.03% (v/v) HCl prior to reaction with 0.2% (m/v) alkaline NaBH 4 solution. Lead contents of a rum and two different red wine samples were determined by FI-HG-AAS agreed with those obtained by ICP-MS. The analytical figures of merit of method developed were determined. The calibration curve was linear up to 8.0 gL −1 Pb with a regression coefficient of 0.998. The relative error was lower than 4.58%. The relative standard deviation (n = 7) was better than 12%. A detection limit of 0.16 gL −1 was achieved for a sample volume of 170 L.

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“…Various combinations of oxidants and complexing agents have also been used [12,13]. Brindle et al [23] have devised a method for the determination of Pb in calcium carbonate by FI-HG with quantification by DC plasma atomic emission spectrometry. By separation of the analyte from the matrix they were able to overcome a spectral interference due to the calcium.…”

Section: Introductionmentioning

confidence: 99%

Flow injection hydride generation electrothermal atomic absorption spectrometry with in-atomizer trapping for the determination of lead in calcium supplements

Tyson

Ellis

Carnrick

et al. 2000

Talanta

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Lead hydride was generated from acid solution, containing potassium ferricyanide as an oxidizing agent, by the reaction with alkaline borohydride solution. The effects of reaction conditions (hydrochloric acid, ferricyanide and borohydride concentrations), and the lengths of reaction and stripping coils were studied. The effects of trapping temperature and argon flow rate were also investigated. Under the conditions giving the best peak area sensitivity, the detection limit (concentration giving a signal equal to three S.D. of the blank signal) was 0.12 mgl − 1 for a 1000 ml injection volume. The detection limit was improved to 0.03 mgl − 1 when the ferricyanide was purified b y passage through a cation-exchange resin. Two calcium supplement materials were analyzed by the flow i njection ( , respectively.

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Determination of lead in calcium carbonate by flow-injection hydride generation with dc plasma atomic emission detection

Cited by 22 publications

References 20 publications

Determination of lead by hydride generation inductively coupled plasma mass spectrometry (HG-ICP-MS): On-line generation of plumbane using potassium hexacyanomanganate(III)

Determination of lead by hydride generation inductively coupled plasma mass spectrometry (HG-ICP-MS): On-line generation of plumbane using potassium hexacyanomanganate(III)

Determination of lead in wine and rum samples by flow injection-hydride generation-atomic absorption spectrometry

Flow injection hydride generation electrothermal atomic absorption spectrometry with in-atomizer trapping for the determination of lead in calcium supplements

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