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植物中K元素检测方案(ICP-AES)

The determination of the elemental composition in plants is important for development, growth and maintenance of plant tissues. Elements, such as Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, S, Sr, P, and Zn, are important for plant nutrition, being vital nutrients required for tissue development, maintenance and plant metabolism [1]. The determination of macro, micronutrients and contaminants in plant samples is important to keep up with sources of nutrients and minerals. The chemical analysis of plant materials can be applied to assist in the remediation of contaminated soils or to solve mineral malnutrition, a problem that seriously affects the human population [2, 3]. Inductively coupled plasma optical emission spectrometry (ICP-OES) is an attractive technique for this analysis because it can accommodate the wide concentration ranges typical of macro and micronutrients in plants. 2 Agronomical laboratories typically deal with large batches of samples. Several critical elements, in wide concentration ranges, must be determined on a routine basis for such samples. The Agilent 5100 Synchronous Vertical Dual View (SVDV) ICP-OES with Dichroic Spectral Combiner (DSC) technology, has the ability to keep up with these demands, performing axial and radial measurements in a single reading, leading to faster sample throughput times. With faster sample run times, the 5100 SVDV requires less argon per sample, meaning significant savings can be made for labs involved in high throughput analysis. The Vista Chip II detector used in the 5100 ICP-OES has the fastest processing speed (1 MHz) of any charge coupled device (CCD) detector used in ICP-OES. It delivers fast warm-up, high throughput, high sensitivity, and the largest dynamic range. This application note describes the quantitation of Al, B, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn in microwave acid digested alfalfa, corn and sugarcane samples and an apple leaves certified reference material (SRM NIST 1515), using the Agilent 5100
检测样品: 其他
检测项: K元素

安捷伦科技(中国)有限公司

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DHA乳液中稳定性检测方案(激光光散射仪)

1. 介绍 二十二碳六烯酸(DHA)是一种ω-3长链多不饱和脂肪酸(ω-3 LCPUFA)。DHA具有很好的保健作用,如预防心血管疾病的发生、抗炎、促进视觉和神经发育、改善大脑功能、降低癌症风险以及预防其他代谢和慢性疾病。然而,DHA的结构由双烯丙基亚甲基组成,所有-CH=CH-键均以顺式构型存在,故DHA在有氧、光照、热等环境下很不稳定。据报道,ω-3 LCPUFA氧化会形成对人体有害的化合物和难闻的异味,极易氧化和低水溶性会降低DHA的生物利用度,这都大大限制DHA了在加工食品和饮料中的利用。 近年来很多研究致力于研究包埋DHA的乳液载体系统,这类系统可用于包埋DHA,以提高其水溶性、物理化学稳定性及其生物利用度。已开发出越来越多的基于乳液的系统,这些系统具有不同的特性,以满足特定加工应用中胶囊成分的结构和功能要求,包括多重乳液、胶体体、微团簇、聚合物复合物、填充水凝胶微球和脂质体。上述每种系统都有各自的优缺点。因此,应根据应用条件选择合适的载体系统。一般来说,蛋白乳液受环境条件的影响,如pH值、温度和离子强度。乳状液本质上是热力学不稳定的系统。当pH值接近吸附蛋白质的等电点(pI)时,或在存在高离子强度时,由于液滴之间的静电斥力减少,可能发生聚结、絮凝、乳状化和相分离。 Ningning Ma等人利用利用LumiSizer研究分析DHA乳液和微粒在不同的pH条件下的稳定性。这也为DHA乳液设计和制造微粒提供理论和数据的支持,使得DHA今后可更好地添加在食品、饮料和医药产品中,发挥其有益的功能特性。
检测样品: 其他
检测项: 理化分析

罗姆(江苏)仪器有限公司

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仪器信息网行业应用栏目为您提供1690篇其他检测方案,可分别用于荧光成像检测、DNA纯度检测、种类检测、分离纯化检测,参考标准主要有等