This method was applied to the determination of a ferroniobium certified reference material and the results compare favourably with the certified values.
Based on the new method, a criterion of determining overconstrained mechanisms was presented and a new four-loop planar overconstrained mechanism was certified.
Certified reference material of the high-purity silicasol was prepared by removing impurity ions from the high purity silicasol according to the ion exchange resin.
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