Abstract
The study examined the stability of HVA and VMA in 1-ml aliquots of a single urine sample stored on filter paper at different temperatures for 2 years. The results showed that HVA and VMA were stable in dried filter paper when stored at 4 degrees C or lower temperature. Storage at room temperature resulted in degradation of the sample.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Homovanillic Acid / urine*
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Humans
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Infant, Newborn
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Neonatal Screening* / instrumentation
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Neonatal Screening* / methods
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Neuroblastoma / prevention & control*
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Neuroblastoma / urine
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Vanilmandelic Acid / urine*
Substances
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Vanilmandelic Acid
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Homovanillic Acid