Method for determining ratio of lead isotopes in sample of different parts of waxberry tree and identifying origin of waxberry
A technique for isotope ratios, samples, used in analytical chemistry to address issues of increased uncertainty and complexity
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Embodiment 1
[0062] The determination of the isotope ratio of the lead of the different parts samples of bayberry tree in the Cixi origin of embodiment 1
[0063] Waxberry sample, bayberry leaf sample, bayberry branch sample, bayberry tree root sample or bayberry tree root soil sample is to use ceramic scissors after drying bayberry, bayberry tree leaf, bayberry tree branch, bayberry tree root or bayberry tree root soil respectively After cutting it small, it is made by grinding it with a mortar.
[0064] (1) Weigh 1g red bayberry sample, add 10mL concentrated nitric acid; 0.5g leaf sample, add 9mL concentrated nitric acid; For tree branch samples, add 10mL of concentrated nitric acid; for 0.3g bayberry tree root samples, add 7mL of concentrated nitric acid;
[0065] Put them into a microwave digestion apparatus (Multiwave 3000 produced by Anton Paar) for digestion. The heating program is 5min to 400w, hold for 5min, then rise to 800w for 5min, hold for 5min, cool down to room temperature...
Embodiment 2
[0080] Get the red bayberry sample of Cixi, Yuyao, Wenzhou three producing areas, measure the isotope ratio of lead according to the method step of embodiment 1 207 Pb / 206 Pb and 206 Pb / 208 Pb, make a correlation distribution map, such as figure 1 as shown, figure 1 It can be seen that there are significant differences among the isotope ratio distributions of lead in the three producing areas, and each has a different distribution interval. therefore figure 1 It can be used to identify bayberry from different origins. Determination of the isotope ratio of lead on bayberry samples of unknown origin 207 Pb / 206 Pb and 206 Pb / 208 Pb, by observing which distribution interval its numerical distribution is close to, it can be identified as the origin of the distribution interval.
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