对于杂质的测定，一般取含一定杂质量的样品进行分析，证明此杂质测定其具有适宜的准确度和精密度。
As to test for impurity: a certain amount of the impurity may be added to the sample to testify the accuracy and precision of the method.
利用精密分析仪器测定风味物质，并依此作为衡量风味质量的指标，是食品风味研究的主要手段和发展趋势。
To investigate the flavor compounds by the precise instruments and make it be the target to the flavor quality, which is the mean methods and direction to researching the flavor in food.
前言： 通过精密度偏性试验（AQC试验），分析确定影响总磷测定结果的主要因素；对分析化验室监测数据的质量进行检验和评价。
Based on AQC test, the main factors influencing the results of total phosphor determination are analyzed so as to check up and evaluate the quality of measuring data of assay laboratory.
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