The determination of nanogram amounts of
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Klaus Beyermann; Harry J. Rose Jr.; Ralph P. Christian
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Article
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1969
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Elsevier Science
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English
โ 445 KB
THE I~ETEKMINATION OF N\_4NOGlL4M AMOUNTS OF CHROMIUM IN URINE 13Y X-RAY I~LUORESCENCE SPIXTROSCOl'Y \* Chromium lias been recognized as an essential trace elcmentl in glucose metabolism. Recausc cl~romiuin is normally present in biological materials at concentrations of IO--100 ppb., sensitive and