Abstract

Poppy seeds are one of the most important and oldest oil-bearing crops in the world. Therefore, quality control of poppy seeds and food products whose composition contains them as a food additive, is very important. To this end, we have applied procedures for solid-phase spectrophotometric and photometric determining of micro elements in food products. It was established that in determining cadmium and zinc, the best ion exchanger for the group concentration of interfering metal ions is the ion exchanger with the immobilized KO. made it possible to concentrate and determine in the solid phase the ions of Hg(II). Using enabled selective determining of Pb(II). Selective determining of the Fe(III) ions at pH 3 was conducted using ammonium thiocyanate. Cu(II) was determined photometrically upon masking the ions of Fe(III) employing SPADNS. Based on the data acquired, we have developed a microelement analysis scheme for poppy seeds. It was established that the sample contained, mg/kg: Cu(ІІ) – 5.0; Pb(ІІ) – 0.3, Zn(ІІ) – 50, P(V) – 1,600, K − 550, Na – 20, Ca – 1,500, Mg(II) – 450; Fe(ІІІ) −10; Cd(ІІ) and Hg(ІІ) are absent. The proposed scheme for analysis of poppy seeds is universal and could be applied for microelement analysis of other food products. The procedures employed are characterized by sensitivity and selectivity. Ion exchangers with the immobilized dyes, as well as procedures for the solid-phase spectrophotometric determining, are environmentally safe. They do not require the use of toxic organic reagents. The procedures applied are easy to use. Relative standard deviation in the results does not exceed 0.10. This indicates good reproducibility of the results.

Highlights

  • Poppy seeds are one of the most important and oldest oil-bearing crops in the world

  • Because healing and toxic properties of poppy seeds are attributed to chemical composition, in particular micro elements, we considered it interesting to develop a scheme of analysis of poppy seeds applying a solid-phase spectrophotometry method

  • We have substantiated the possibilities of applying the solid phase reagents pyrocatechol violet (PCV), xylenol orange (XO), MTB and SPADNS for the analysis of poppy seeds

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Summary

Introduction

Poppy seeds are one of the most important and oldest oil-bearing crops in the world. Quality control of poppy seeds and food products whose formulation includes it as a food additive is very important [1]. A method of solid phase spectrophotometry (SPS) proved to be promising in the analysis of food objects. It employs, as sorbents, weakly-light-scattering ion-exchange resins with immobilized analytical reagents. As sorbents, weakly-light-scattering ion-exchange resins with immobilized analytical reagents The method makes it possible to combine the sorption concentration of metal ions and subsequent photometric determining in the solid phase [2,3,4,5].

Literature review and problem statement
The aim and objectives of the study
Discussion of results on determining the microelements in poppy seeds
Preparation of reagents solutions and synthesis of the solid-phase dyes
Conclusions

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