The Flexar Series 200/200a EP Photo Diode Array Detector provides true UV/VIS detection and high resolution spectral data. The excellent signal-to-noise characteristics make it ideally suited for low-volume or low concentration samples.
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Whether you’re a lab manager or a bench chemist, you know firsthand how things are changing quickly in food and environmental analysis. And your lab needs to change to keep pace.
Product Certificate for the Flexar Solvent Manager
Product Certificate for the LC Flexar PDA Plus Detector, Photodiode Array Detector LC 300, and Multi-Wavelength UV/VIS Detector LC 300
本文介绍了用光电二极管阵列（PDA）检测器检测，通过HPLC分离和定量监测几种食品基质提取物中12种主要大麻素的样品制备和分析方法。该方法重现性好，并能提供远低于当前食用大麻素浓度水平的定量限。因此，本文所定义的方法/程序可预期完成确保食用食品中产品一致性和大麻素筛选的基本任务。
误用感冒药可通过适当的药物说明和准确标签注解的方式来避免。为此，美国食品药品管理局和制药工厂都制定了标准的常规测定程序，以保证药品中的活性成分含量准确。本应用文献建立了对乙酰氨基酚、右美沙芬、苯福林同时进行分析的方法。文章还提供了方法条件和精密度。本文分析了一种感冒药片剂中活性成分的种类及其含量。
如今人们越来越意识到到多环芳烃（PAH）……
针对香草精可能存在的掺假问题，本申请集中在高效液相色谱法分离和定量三种商店购买的香草精中的香兰素、乙基香兰素和香豆素。
啤酒酿造过程中质量控制的一个重要方面是确保不同批次的α-酸的类型和数量是相同的，并且在酿造过程中，它们转化为苦味的异-a-酸，使单个品牌具有一致的可识别味道。本应用说明提供了一种直接的方法来测定五种啤酒花小球中a-酸的类型和数量。对一种美国IPA啤酒进行了分析，以确认异构化a酸的存在。
植物性食物是一种复杂的化学混合物，包括必需营养素和生物活性非必需营养素，称为植物化学物质。
用于防止皮肤受到太阳辐射伤害的化妆品中通常含有较高浓度的相关成分，这可能会对人体健康带来风险。例如，氧苯酮可能会导致黑色素瘤，这种黑色素瘤与紫外线照射后产生攻击DNA的自由基有关。已证实用作抗菌防腐剂的对羟基苯甲酸酯具有雌激素活性，可能导致罹患乳腺癌的风险增加。尽管FDA等监管机构认为该成分无害，但制造商必须对其产品中这些成分及其他潜在有害化合物的浓度进行监测，确保各物质的浓度处于安全水平且符合相关规定的要求。本应用文献建立了一种分析方法，即利用配有PDA检测器的UHPLC对多种化妆品中的对羟基苯甲酸酯和其他活性成分进行分析。
本应用文献提供了一种快速、可靠的液相色谱法，可同时测试9种广泛使用的添加剂。测试的添加剂包括：防腐剂（苯甲酸、山梨酸、脱氢乙酸和对羟基苯甲酸甲酯）；人工甜味剂（乙酰磺胺酸钾、糖精和阿斯巴甜）；调味剂（奎宁）；兴奋剂（咖啡因）。
色素用于增强食品的颜色，使其看起来诱人。它们也用于减少颜色变化，并延长货架上的颜色稳定性。本应用说明提供了一种快速可靠的HPLC方法，用于饮料中色素的测定，阐述了方法条件和性能数据，包括精密度和线性度。分析了一种广受欢迎的橙色苏打水，确定了色素的种类和用量。
酚类抗氧化剂和抗坏血酸棕榈酸酯常用于食品中，以防止油脂氧化。氧化的油会引起食品中的恶臭和酸败。
本工作的目的是开发一种简单、快速、可靠的液相色谱法，用于大豆制品中六种最广泛使用的异黄酮的分析。
Ginseng has been used as an herbal medicine in Asia for over two thousand years for its purported various health benefits, including antioxidant, anticarcinogenic, antiinflammatory, antihypertensive and anti-diabetic. The pharmacologically active compounds behind the claims of ginseng’s efficacy are ...
Presented is an alternative technique to quantitate benzodiazepines in plasma using a rapid protein precipitation method with a fast LC separation method in combination with TOF-MS.
Alpha acids (a-acids) are a class of chemical compounds of primary importance in the production of beer. They are found in the resin glands of the flowers of the hop plant (Humulus lupulus) and are normally added to the boil after mashing the grains, providing beers with their aroma and bitter taste ...
This application note will present a fast, sensitive and reliable UHPLC analysis of six common parabens. A PerkinElmer Flexar FX-15 UHPLC system fitted with a Flexar FX PDA photodiode array detector was used. The separation was achieved using a PerkinElmer Brownlee Analytical C18, 1.9 µm 50 mm x 2.1 ...
Over time, exposure to ultra violet (UV) ,radiation from the sun or tanning beds can ,damage the skin’s cellular DNA, resulting in ,mutations that cause 3.5 million cases of skin ,cancers and about 11,500 deaths in the U.S. ,each year, for a total cost of nearly $2 billion. ,There are three types of ...
In 2009, the United States Pharmacopeial Convention introduced the USP Dietary Supplements Compendium (DSC) – an industry directed resource featuring regulatory guidance, documents, supplemental information, and reference tools.
Biocides are chemical substances that are used to kill or inhibit harmful organisms. Biocides have a wide range of applications in consumer and industrial products.
This application will focus on the solid phase extraction (SPE) and HPLC analysis of chlorophenols in three tap water samples.
Patulin is produced by various molds, which primarily infect the moldy part of apples. Removing the moldy and damaged parts of the fruit may not eliminate all the patulin because some of it may migrate into sound parts of the flesh.
Sweeteners are low or zero-calorie sugar substitutes that are added in drinks, processed foods and pharmaceutical products to provide the sweet taste of table sugar, which is also called sucrose.
Water polluted by herbicides leach and runoff can cause human health problems including cancer tumors, reproduction deformity, disruption of the endocrine system and DNA damage. This application presents a sensitive and robust liquid chromatography method to test nine widely used herbicides (Figure ...