Abstract
Study of macro- and microelement composition of the ash of plant raw materials revealed the prevailing matrix elements, their chemical form and content. It is shown that direct determination of the impurities in mineral residues by the method of arc atomic emission spectroscopy with a multichannel analyzer of emission spectra (MAÉS) is complicated by the impact of the macro component and its chemical form on the intensity of the spectral lines of the impurities. Introduction of a corrective additive is proved to eliminate this effect. A technique for measuring the mass fraction of macro elements and trace elements in plant ash is proposed and metrological certification of the procedure is carried out.
Highlights
© Âëàäèìèð Èëüè÷ Îòìàõîâ1, Åâãåíèÿ Ñåðãååâíà Ðàáöåâè÷1, Åëåíà Âàñèëüåâíà Ïåòðîâà1, Èíåññà Âëàäèìèðîâíà Øèëîâà1,2, Åêàòåðèíà Ñåðãååâíà Øåëåã1, Äåíèñ Åâãåíüåâè÷ Áàáåíêîâ1
It is shown that direct determination of the impurities in mineral residues by the method of arc atomic emission spectroscopy with a multichannel analyzer of emission spectra (MAÉS) is complicated by the impact of the macro component and its chemical form on the intensity of the spectral lines of the impurities
Ïîêàçàòåëè òî÷íîñòè, ïðàâèëüíîñòè, ïðåöèçèîííîñòè ìåòîäèê êîëè÷åñòâåííîãî õèìè÷åñêîãî àíàëèçà
Summary
Ýìèññèîííîé ñïåêòðîìåòðèè (ÄÀÝÑ) ñ èñïîëüçîâàíèåì ñïåêòðàëüíîãî êîìïëåêñà ïðîèçâîäñòâà ïðåäïðèÿòèÿ «ÂÌÊ-Îïòîýëåêòðîíèêà», êîòîðûé âêëþ÷àåò ñïåêòðîìåòð «Ãðàíä» ñ ìíîãîêàíàëüíûì àíàëèçàòîðîì ýìèññèîííûõ ñïåêòðîâ (ÌÀÝÑ) è ñïåêòðîàíàëèòè÷åñêèé ãåíåðàòîð «Âåçóâèé-3» ñî øòàòèâîì ÓØÒ-4 [4 – 7]. Îïðåäåëåíèå ýëåìåíòîâ îñíîâû è èõ ôîðì â çîëå ðàñòåíèé. Ãðàäóèðîâî÷íóþ çàâèñèìîñòü äëÿ îïðåäåëåíèÿ îñíîâíûõ êîìïîíåíòîâ ñòðîèëè ñ èñïîëüçîâàíèåì êîìïëåêòà ãîñóäàðñòâåííûõ ñòàíäàðòíûõ îáðàçöîâ ñîñòàâà ãðàôèòîâîãî êîëëåêòîðà ìèêðîïðèìåñåé ÑÎÃ-37 (ÃÑÎ 8487–2003) [9]. Ùåëî÷íûå ýëåìåíòû (K, Na) îïðåäåëÿëè â ðàñòâîðå çîëüíîãî îñòàòêà ðàñòåíèé ìåòîäîì àòîìíî-ýìèññèîííîé ñïåêòðîìåòðèè ñ àòîìèçàöèåé â ïëàìåíè (ÏÀÝÑ) ñ èñïîëüçîâàíèåì ñïåêòðîìåòðà Solaar. Ïðàâèëüíîñòü îïðåäåëåíèÿ îñíîâíûõ êîìïîíåíòîâ â çîëå ðàñòåíèé ñ ïðåäëàãàåìûì ñïîñîáîì ïðîáîïîäãîòîâêè áûëà ïðîâåðåíà ïðè àíàëèçå ñòàíäàðòíîãî îáðàçöà ëèñòà áåðåçû ËÁ-1 [10] êàê áëèçêîãî àíàëîãà ëåêàðñòâåííûõ ðàñòåíèé Îïðåäåëåíèå ìèêðîýëåìåíòîâ ìåòîäîì ÄÀÝÑ â çîëüíîì îñòàòêå ðàñòåíèé âîçìîæíî ïðè åãî íåáîëüøîì (íå áîëåå ÷åì 5 – 10-êðàòíîì) ðàçáàâëåíèè ãðàôèòîâûì ïîðîøêîì. Ó÷èòûâàÿ ðåçóëüòàòû îïðåäåëåíèÿ îñíîâíûõ (ìàòðè÷íûõ) ýëåìåíòîâ â çîëå ðàñòåíèé Ðåçóëüòàòû îïðåäåëåíèÿ (ìêã/ã) îñíîâíûõ ýëåìåíòîâ â ñòàíäàðòíîì îáðàçöå ËÁ-1 ìåòîäîì ÄÀÝÑ (n = 10, P = 0,95, tòàáë = 2,28)
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