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The advantage to using vapor collection instead of the syringe when testing samples for hydrocarbons is

the vapor collection is less expensive and less time consuming
the vapor method increases the sensitivity of the test
the syringe is easily contaminated by the surrounding air
the vapor method is less likely to start another

User Challet
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Answer:

the vapor method increases the sensitivity of the test

Step-by-step explanation:

User Rob Blinsinger
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