《Table 6 Results of recovery test (n=5)》

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《Determination of Phenolic Substances in Vidal Blanc Grape》

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1.0 g of ice grape sample powder（containing gallic aid1 550μg，epicatechin 20.55 mg，catechin 77.11 mg，ferulic acid0.738 8μg，chlorogenic acid 0.910 0μg，rutin 164.5μg and caffeic acid 175.8μg）was accurately measured，and added with gallic acid，epicatechin，catechin，ferulic acid，chlorogenic acid，rutin and caffeic acid reference solutions，respectively.The obtained mixtures were prepared according to\""Preparation of test solutions\""into solutions which were then determined，giving chromatograms.Recoveries were calculated，as shown in Table 6.