In loading test

Zinc load tests. Ihe appearance of zinc in the blood after a zinc load test has been used to detect differences In absorption between diets (5). Large differences in absorption can be detected with this method, but the absolute quantity of zinc absorbed or the percentage absorbed cannot be determined this way. In addition, the amount of zinc used in load tests is high compared to amounts usually consumed. Ihese factors make it difficult to extrapolate from load test results to absorption of more usual zinc Intakes. 

Figure 10.2 Stressing jig used in loading test fixture (Reprinted with permission from the Annual Book ofASTM Standards, Vol. 15.06. Copyright ASTM, 1916 Race Street, Philadelphia, PA, 19103.)...

In order to generate practical service life predictions - taking the mentioned limitations into consideration - two requirements have to be fulfilled the conditions occurring in load tests and in service must be determined as exactly as possible in addition, the criteria used for characterizing damage conditions have to be practical and meaningful, see Chapter 2. 

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