Global Migration Tests

The following food simulants are used for food contact plastics  

Distilled water 95% Ethanol 5% - Alcoholic beverages such as beers and lagers 

A solution of 3% w/v acetic acid in dishlled water -Acidic aqueous foods 

Ohve oil - Fatty foods (also isopropanol or hexane) ( Isopropanol and Hexane have been introduced as fatty food simulants to circumvent the analytical problems that can occur with ohve oil due to its potential variability as a natural product and involatility.) 

As menhoned, the global migrahon figure for a parhcular plastics material is determined gravimetrically. One 

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Global migrahon tests - In these, the plastic is put into contact with an appropriate food simulant under representahve end use conditions and the total amount of material that has migrated into the simulant determined gravimetrically or, in the case of involahle food simulants such as olive oil, by gas chromatography. 

During scheduled power outage test, back-up power did not come on line in the prescribed time. Agent vapor migration to Observation Corridors due to HVAC failure during global loss of power. 

Table 1.1 lists some historical "firsts" with regard to nuclear weapons. The extensive tests in the atmosphere up to 1963 lead to a large global q>read of tritium, fission products and actinides. Scimtists have used this to learn more about global wind and water currents. Radiochemists have studied the migration of deposited radionuclides, as discussed in Chapter 22, radioecologists the uptake of radioactive elements by plants and animals, as described in Chapter 18, etc. 

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