等离子体发射光谱法：代谢平衡研究中钙、磷和铬的测量。

Plasma emission spectrometry: measurement of calcium, phosphorus and chromium in metabolic balance studies.

作者信息

Roberts N B, Fairclough D, Taylor W H

出版信息

Ann Clin Biochem. 1984 May;21 ( Pt 3):213-7. doi: 10.1177/000456328402100308.

Abstract

Direct-current plasma emission spectrometry determines food calcium and phosphorus, faecal calcium and chromium, and urinary calcium and phosphorus accurately, precisely and rapidly without acid digestion or dry ashing. Food and faeces are homogenised, diluted and aspirated directly into the plasma. The method makes metabolic balances swifter and less labour-intensive; it enables the use of chromium sesquioxide as an inert marker, for perchlorate digestion is avoided. Both plasma emission (-9.9%) and a dry ashing procedure (-13.5%) give lower values for food phosphorus than those derived from food tables.

摘要

直流等离子体发射光谱法无需酸消解或干灰化，就能准确、精密且快速地测定食物中的钙和磷、粪便中的钙和铬以及尿液中的钙和磷。食物和粪便经匀浆、稀释后直接吸入等离子体中。该方法使代谢平衡测定更快且劳动强度更低；它能够使用三氧化二铬作为惰性标记物，避免了高氯酸盐消解。与食物成分表中的数据相比，等离子体发射法（-9.9%）和干灰化法（-13.5%）测得的食物磷含量均较低。