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Development of Sequential Injection Analysis for the Determination of Lead in Vegetables

Paper Type 
Contributed Paper
Development of Sequential Injection Analysis for the Determination of Lead in Vegetables
Tharinee Wonganan, Kanokwan Chaiyasing, Boonsom Liawruangrath, Narabhats Rannurags and Saisunee Liawruangrath

     A sequential injection analysis incorporated with spectrophotometric method was developed for determination of lead, based on reaction of dithizone with lead producing pink complex and absorbance of the complex was measured at 515 nm. The analytical parameters of the system were optimized by univariate method such as reagent concentration, fl ow rate of reagent and injection volume. Linear calibration curve over the range of 0.02-0.08 mg L-1 and 0.1-2.0 mg L-1 lead was obtained. The detection limit of lead was 0.012 mg L-1. The relative standard deviations for fi ve replicate injections was 0.77-1.54% for intra-day and 0.86-1.80% for inter-day. The recovery of 98.75-101.20% was achieved with sample throughput of 45 samples per hour. The proposed method has been applied to the determination of lead in vegetable samples. The obtained results were in good agreement with those obtained by the ICP-MS standard method, verifi ed by the student t-test at the 95% confi dence level.

Start & End Page 
1116 - 1128
Received Date 
Revised Date 
Accepted Date 
Full Text 
sequential injection analysis, lead, dithizone, spectrophotometric method, vegetable samples
Vol.49 No.4 (July 2022)
Wonganan T., Chaiyasing K., Liawruangrath B., Rannurags N. and Liawruangrath S., Development of Sequential Injection Analysis for the Determination of Lead in Vegetables, Chiang Mai J. Sci., 2022; 49(4): 1116-1128. DOI 10.12982/CMJS.2022.069.
View:439 Download:214


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Phase and Chemical Characterization of Perovskite Lead Nickel Niobate Ceramics Fabricated Via a Columbite Precursor Method
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Vol.36 No.1 (JANUARY 2009) View: 505 Download:175
Lead-Free Piezoelectric Ceramic Based on (Bi 1/2 Na 1/2 )TiO 3-(Bi 1/2 K1/2 )TiO 3-BaTiO 3 Solid Solution
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Vol.32 No.3 (SEPTEMBER 2005) View: 550 Download:154
Characterization of Perovskite Lead Iron Niobate Powders Synthesized by Partial Oxalate
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Vol.32 No.1 (JANUARY 2005) View: 509 Download:141
Hydrothermal Synthesis of Lead Titanate Fine Powders at Water Boiling Temperature
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Vol.37 No.1 (JANUARY 2010) View: 569 Download:612
Characterization of Nitrate Route Synthesized Lead Zirconate Titanate Powders and Ceramics
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Vol.29 No.3 (DECEMBER 2002) View: 509 Download:194

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Chiang Mai Journal of Science

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