M2 PRESSWIRE-August 20, 2019-: Lanthanum Nitrate
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All chemical reagents used in the experiments were of analytical grade purchased from Merck (Germany), mainly including lanthanum nitrate
[(La(N[O.sub.3]).sub.3] x 6[H.sub.2]O), sodium hydrate (NaOH), anhydrous sodium phosphate ([Na.sub.3]P[O.sub.4]), sodium fluoride (NaF), and nitric acid (HN[O.sub.3]).
For the preparation of La-doped ZnO samples, lanthanum nitrate
[La[(N[O.sub.3]).sub.3].6[H.sub.2]O] was added to the initial mixture of zinc nitrate and glycine.
was prepared by reacting lanthanum oxide (Inner Mongolia Baotou Rare Earth High Technology Co., China) with concentrated nitric acid (Tianjin KEMIOU Chemical Reagent Co., China).
First, stoichiometric molar ratios of the reagents, such as iron nitrate [Fe (NO3)3.9H2O], lanthanum nitrate
[La (NO3)3.6H2O], strontium nitrate [Sr (NO3)2] and citric acid, all of analytical grade purity, were dissolved in de-ionized water to form a homogenous solution, having a total volume of 50 ml.
Briefly, 20 ul of sample, working standards and quality control standards contain lanthanum nitrate
(10 ml of lanthanum nitrate
for 100 ml of sample solution; 1 ml of lanthanum nitrate
contain 50 mg of lanthanum) were injected into the furnace with continuous purge gas (Argon) on a Perkin-Elmer AAnalyst 700 atomic absorption spectrometer.