Carbon Paste Electrode Modified by Dibenzo 18-crown-6 for the Determination of Pb in Carrot Using Differential Pulse Voltammetry

Irdhawati Irdhawati; Manuntun Manurung

Makale detayları

Carbon Paste Electrode Modified by Dibenzo 18-crown-6 for the Determination of Pb in Carrot Using Differential Pulse Voltammetry

Yazarlar:

Irdhawati Irdhawati | Manuntun Manurung

Yayıncı:

Turkish Chemical Society

Ana Başlıklar:

Analytical Chemistry

Dergi:

Journal of the Turkish Chemical Society Section A: Chemistry Vol.10 Issue 4, pp.941-952

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001294221

pISSN:

2149-0120

Anahtar kelimeler:

Özet:

 In this research, the modification of carbon paste electrode CPE using dibenzo 18-crown-6 was carried out to detect Pb level in carrot. The purpose of this electrode modification is to increase the sensitivity of the measurement. The optimized parameters were scan rate, composition of dibenzo 18-crown-6 in carbon paste, and supporting electrolyte. Measurements were validated by determining the linear concentration range, detection limit LoD, quantification limit LoQ, repeatability, selectivity, and recovery. At the best measurement conditions, the modified CPE CPE-Dbc was applied to determine Pb in carrot. The optimum measurements conditions were obtained the optimum concentration of crown ether in carbon paste was 0.8, the scan rate using CPE at 15 mVs, increased to 20 mVs, and H2SO4 solution as supporting electrolyte. The linear concentration was found in the range of 5-100 µgL using CPE and became wider to 5-2000 µgL using CPE-Dbc. The values of LoD and LoQ measurement using CPE were 0,3575 µgL and 0,3583 µgL, and decreased to 0,1265 µgL and 0,1266 µgL using CPE-Dbc. CPE and CPE-Dbc had good precision with Horwitz ratio values were 0,2231 and 0,2183, which is smaller than two. The percentage of recovery of Pb in the mixture of standard and sample solutions was 88,97  2,76. The presence of Cu, Cd and Na in the solution did not interfere the measurement of Pb. The concentration of Pb in carrot sample was 1,8423  0,0002 mgkg, which was higher than the acceptable concentration according to SNI No. 7387:2009, which is 0,5 mgkg.

 In this research, the modification of carbon paste electrode CPE using dibenzo 18-crown-6 was carried out to detect Pb level in carrot. The purpose of this electrode modification is to increase the sensitivity of the measurement. The optimized parameters were scan rate, composition of dibenzo 18-crown-6 in carbon paste, and supporting electrolyte. Measurements were validated by determining the linear concentration range, detection limit LoD, quantification limit LoQ, repeatability, selectivity, and recovery. At the best measurement conditions, the modified CPE CPE-Dbc was applied to determine Pb in carrot. The optimum measurements conditions were obtained the optimum concentration of crown ether in carbon paste was 0.8, the scan rate using CPE at 15 mVs, increased to 20 mVs, and H2SO4 solution as supporting electrolyte. The linear concentration was found in the range of 5-100 µgL using CPE and became wider to 5-2000 µgL using CPE-Dbc. The values of LoD and LoQ measurement using CPE were 0,3575 µgL and 0,3583 µgL, and decreased to 0,1265 µgL and 0,1266 µgL using CPE-Dbc. CPE and CPE-Dbc had good precision with Horwitz ratio values were 0,2231 and 0,2183, which is smaller than two. The percentage of recovery of Pb in the mixture of standard and sample solutions was 88,97  2,76. The presence of Cu, Cd and Na in the solution did not interfere the measurement of Pb. The concentration of Pb in carrot sample was 1,8423  0,0002 mgkg, which was higher than the acceptable concentration according to SNI No. 7387:2009, which is 0,5 mgkg.

 In this research, the modification of carbon paste electrode CPE using dibenzo 18-crown-6 was carried out to detect Pb level in carrot. The purpose of this electrode modification is to increase the sensitivity of the measurement. The optimized parameters were scan rate, composition of dibenzo 18-crown-6 in carbon paste, and supporting electrolyte. Measurements were validated by determining the linear concentration range, detection limit LoD, quantification limit LoQ, repeatability, selectivity, and recovery. At the best measurement conditions, the modified CPE CPE-Dbc was applied to determine Pb in carrot. The optimum measurements conditions were obtained the optimum concentration of crown ether in carbon paste was 0.8, the scan rate using CPE at 15 mVs, increased to 20 mVs, and H2SO4 solution as supporting electrolyte. The linear concentration was found in the range of 5-100 µgL using CPE and became wider to 5-2000 µgL using CPE-Dbc. The values of LoD and LoQ measurement using CPE were 0,3575 µgL and 0,3583 µgL, and decreased to 0,1265 µgL and 0,1266 µgL using CPE-Dbc. CPE and CPE-Dbc had good precision with Horwitz ratio values were 0,2231 and 0,2183, which is smaller than two. The percentage of recovery of Pb in the mixture of standard and sample solutions was 88,97  2,76. The presence of Cu, Cd and Na in the solution did not interfere the measurement of Pb. The concentration of Pb in carrot sample was 1,8423  0,0002 mgkg, which was higher than the acceptable concentration according to SNI No. 7387:2009, which is 0,5 mgkg.

 In this research, the modification of carbon paste electrode CPE using dibenzo 18-crown-6 was carried out to detect Pb level in carrot. The purpose of this electrode modification is to increase the sensitivity of the measurement. The optimized parameters were scan rate, composition of dibenzo 18-crown-6 in carbon paste, and supporting electrolyte. Measurements were validated by determining the linear concentration range, detection limit LoD, quantification limit LoQ, repeatability, selectivity, and recovery. At the best measurement conditions, the modified CPE CPE-Dbc was applied to determine Pb in carrot. The optimum measurements conditions were obtained the optimum concentration of crown ether in carbon paste was 0.8, the scan rate using CPE at 15 mVs, increased to 20 mVs, and H2SO4 solution as supporting electrolyte. The linear concentration was found in the range of 5-100 µgL using CPE and became wider to 5-2000 µgL using CPE-Dbc. The values of LoD and LoQ measurement using CPE were 0,3575 µgL and 0,3583 µgL, and decreased to 0,1265 µgL and 0,1266 µgL using CPE-Dbc. CPE and CPE-Dbc had good precision with Horwitz ratio values were 0,2231 and 0,2183, which is smaller than two. The percentage of recovery of Pb in the mixture of standard and sample solutions was 88,97  2,76. The presence of Cu, Cd and Na in the solution did not interfere the measurement of Pb. The concentration of Pb in carrot sample was 1,8423  0,0002 mgkg, which was higher than the acceptable concentration according to SNI No. 7387:2009, which is 0,5 mgkg.

Makale detayları

Carbon Paste Electrode Modified by Dibenzo 18-crown-6 for the Determination of Pb in Carrot Using Differential Pulse Voltammetry

Yazarlar:

Irdhawati Irdhawati | Manuntun Manurung

Yayıncı:

Turkish Chemical Society

Ana Başlıklar:

Analytical Chemistry

Dergi:

Journal of the Turkish Chemical Society Section A: Chemistry Vol.10 Issue 4, pp.941-952

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001294221

pISSN:

2149-0120

carbon paste electrode

carrot

dibenzo 18-crown-6

differential pulse voltammetry

lead (Pb)

validation

Sayı

Makale detayları

Carbon Paste Electrode Modified by Dibenzo 18-crown-6 for the Determination of Pb in Carrot Using Differential Pulse Voltammetry

Yazarlar: Irdhawati Irdhawati | Manuntun Manurung

Yayıncı: Turkish Chemical Society

Ana Başlıklar: Analytical Chemistry

Dergi: Journal of the Turkish Chemical Society Section A: Chemistry Vol.10 Issue 4, pp.941-952

Belge Tipi: Makale

Yayın Tarihi: 11/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001294221

pISSN: 2149-0120

carbon paste electrode

carrot

dibenzo 18-crown-6

differential pulse voltammetry

lead (Pb)

validation

Sayı

Yazarlar:

Irdhawati Irdhawati | Manuntun Manurung

Yayıncı:

Turkish Chemical Society

Ana Başlıklar:

Analytical Chemistry

Dergi:

Journal of the Turkish Chemical Society Section A: Chemistry Vol.10 Issue 4, pp.941-952

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001294221

pISSN:

2149-0120