首页> 美国卫生研究院文献>International Journal of Tryptophan Research : IJTR >Determination of Dipicolinic Acid in Natto by High-Performance Liquid Chromatography Coupled With Postcolumn Photoirradiation With Zinc Acetate
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Determination of Dipicolinic Acid in Natto by High-Performance Liquid Chromatography Coupled With Postcolumn Photoirradiation With Zinc Acetate

机译:高效液相色谱-乙酸锌柱后照射-高效液相色谱法测定纳豆中的二吡啶甲酸

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摘要

A system was developed for determining dipicolinic acid in “natto” using liquid chromatography with fluorometric detection. The compound was separated by reversed-phase chromatography using a mobile phase of 0.1 mol/L disodium hydrogen phosphate, 0.05 mol/L citric acid buffer (adjusted to pH 3.0) containing 3.0 mmol/L zinc acetate and 35 mmol/L perchloric acid. The compound in the column effluent was irradiated with ultraviolet light to produce fluorescence. This fluorescence was monitored at an excitation at 336 nm and an emission at 448 nm. The calibration curve for dipicolinic acid was observed to be linear in a range of 0.2 to 112 ng. The dipicolinic acid content of natto was 7.24 ± 0.54 mg/100 g (wet weight, mean ± standard deviation [SD], n = 6).
机译:开发了使用液相色谱和荧光检测法测定“纳豆”中二吡啶甲酸的系统。通过反相色谱分离该化合物,使用0.1 3 mol / L磷酸氢二钠,0.05 mol / L柠檬酸缓冲液(调节至pH 3.0)的流动相,其中包含3.0 mmol / L的乙酸锌和35 mmol / L的高氯酸。用紫外光照射柱流出物中的化合物以产生荧光。在336 nm的激发下和448 nm的发射下监测荧光。观察到二吡啶甲酸的校准曲线在0.2至112 ng范围内呈线性。纳豆的二吡啶甲酸含量为7.24±0.54mg /100μg(湿重,平均±标准偏差[SD],n = 6)。

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