氨基酸混合标准储备液：含有天冬氨酸、苏氨酸等17种常见组成蛋白质的氨基酸。 色氨酸标准储备液：用PH2.2的柠檬酸缓冲液配置成2.5umol/L的储备液备用。 正亮氨酸标准储备液：用PH2.2的柠檬酸缓冲液配置成2.5umol/L的储备液备用。 将17种氨基酸混合标准储备液、牛磺酸标准储备液、正亮氨酸标准储备液及PH2.2的柠檬酸缓冲液按照1:1:1:7配置成0.25umol/L的标准品待用。

用英国百康Biochrom30+氨基酸分析仪检测饲料中酸水解氨基酸的应用方法。一、 样品前处理 二、 分析方法描述（Biochrom 30+） 三、 外标法定量

一、标样配置 氨基酸混合标准储备液：含有天冬氨酸、苏氨酸等17种常见组成蛋白质的氨基酸。 二、分析方法描述（Biochrom 30+） 三、常规氨基酸570nm标准品谱图 四、常规氨基酸570nm标准品检测限谱图（2.5pmol）

一、标样配置 氨基酸混合标准储备液：含有天冬氨酸、苏氨酸等43种常见生理体液氨基酸。 二、分析方法描述（Biochrom 30+） 三、常规43种生理体液氨基酸标准品谱图 四、常规生理体液氨基酸标准品检测限谱图（2.5pmol，5pmol，10pmol，25pmol）

FT4 通用型粉末测试仪测试方法 FT4 是一台多功能的粉末流动性测试仪，用于测量粉末的流动性质，剪切性质和包含压缩性、透气性和密度在内的粉末整体特性。Freeman Technology 特别意识到粉末在不同加工处理过程和实际应用中所处的不同环境，所以，在仪器设计方面，FT4能够实现在实际测量粉末时模拟这些不同的环境，并表征粉末针对不同特定环境的反应。

Printing and writing have involved the use of color or black materials contained in various vehicles since the time of cavemen. The first pigment believed to be used was probably lampblack dating back as long as 4000 -5000 years. Modern printing inks contain many components each having a specific purpose in maintaining color, intensity, dispersion, viscosity, as well as acting as a milling aide. The table below shows the general type of chemical and its application. These materials impart specific properties to the ink to allow for design considerations of printers and final use.

A Step Towards Quantitative Lipoprotein Density Profiling Analysis: Applied Rayleigh Scattering Ultracentrifugation and imaging techniques of human blood serum are precise and information-rich methods for obtaining information about an individual’s lipoprotein particle content. The information derived from lipoprotein separations via an ultracentrifuge plays a key role in the area of preventative medicine in regards to atherosclerosis. Two of the most critical lipoprotein characteristics, diameter and density, are well preserved with the proper isopycnic gradient. Currently, lipoprotein particles are stained, ultracentrifuged, and profiled through image analysis. This particular technique is helpful in determining particle density and can be correlated loosely with particle concentration. The need to completely quantify lipoprotein concentrations is imperative in assessing risk factors accurately.

The manufacture of Portland cement depends upon many factors, including chemical composition of raw materials, firing temperatures, and particle size. Of particular interest in Particle Size Measurement of Cement by Laser Diffraction Using Microtrac S3500 is particle size measurement, since it can affect the efficiency of process grinding and quality of the final product.

The complex phenomenon of gushing occurring in carbonized beverages has been investigated in order to better understand the mechanism and to give input for further research to introduce preventive measures for the industry. The knowledge that microbubbles are stabilized through surface active substances, and in this form can induce gushing, was used to examine a selection of representative surfactants.

水分活度是收集产品保质期、质构、风味及微生物和化学稳定性的信息关键参数。如今，世界各地运送的食品对其产品的水分活度进行控制，可达到保质期目标并给消费者提供安全无污染食品的目的。

肉与肉制品中水分活度的测定已经变得越来越重要，因为它影响不同化学反应以及微生物的生长及抗菌性。因此对保存食物来说，水分活度至关重要。

Rapid CS Cube 是基于高温分解和红外检测器的全自动硫含量检测设备，符合国际标准ISO 15178。Rapid CS Cube能添加第二个红外检测器，从而同时完成碳硫检测。

任务： Rapid CS Cube 是基于高温分解和红外检测器的全自动硫含量检测设备。 Rapid CS Cube 能添加第二个红外检测器，从而能同时完成碳硫检测。

在环境分析中，即使是非常低的硫含量也需要被测定，例如土壤污染和工业 原材料。 需要专门建立一个检测低含量硫浓度的标准方法 步骤： 和一般含硫样品不同，不能直接称重。准备10ppm 的对氨基苯磺酸溶液， 注射100μl到锡舟中，等水分挥发。这样，每个锡舟中含1μg硫。

最近，越来越多的人关注吸附时结构和性质可进行反向变化的柔性多孔配位聚合物（PCPs）的性质 [1]。自柔性PCPs被首次报道并预测其重要性后[2]，近十年已经制备出这类聚合物。高选择性[3]、适应性[4]和分子水平灵敏度[5]的关键已经被确定为所谓的结构动态性。柔性PCPs最有趣的一点是外源性框架变更导致的阶梯型吸附[3,4,6]。此外，吸附过程中，框架结构在特定压力下，能从闭合状态变为开放状态，从而出现栅效应。这个效应将产生一条S形吸附曲线。闭合结构状态要变为开放，这个启动压力取决于栅开放压（Pgo）和主体框架的结构转变[7]。有趣的是，Pgo的值显示出外源依赖性[8]。这种被吸附物导致的差异显示出柔性PCPs具有广泛的应用前景。这些应用包括：分离、传感器和交换物质。此外，诸如O2、Ar和N2等小分子气态被吸附物已成为研究热点。原因有两点：第一，这些相似气体分子间吸附行为的不同有广泛的商业前景；第二，他们的简单结构和物理性质的微小差别也是科学研究的热点[9]。

氩气测定多种沸石的高精度等温吸附线 K. Nakai*, J. Sonoda, M. Yoshida, M. Hakuman and H. Naono 日本拜耳公司BEL Japan, Inc., 1-9-1 Haradanaka, Toyonaka-shi, Osaka, 561-0807, Japan. E-mail: kazu@nippon-bel.co.jp 简介 本实验检测了两种不同硅烷醇成分的硅土和两种不同氧化铝（质子）成分的MFI沸石的氩气等温吸附（液氩87.3K）和氮气等温吸附（液氮77.4K）。硅烷醇或质子含量变化对氮气吸附有显著影响，但对氩气吸附的影响非常小。我们在相对压力p/po=10–7–0.99的范围内对七种不同微孔大小的沸石进行了氩气的吸附测定。这七种沸石分别是：MFI (ZSM-5)、MTW (ZSM-12)、AFI (SSZ-24)、AFI (AlPO-5)、VFI (VPI-5) [A组] 以及LTA (A型-Ca)、 FAU (Y型) [B组]。A组沸石的微孔通道不含笼结构，而B组有笼结构和窗口效应。研究发现：A组沸石氩气原子的Polanyi吸附势只与孔通道尺寸密切相关，而B组沸石氩气原子吸附势与笼尺寸和孔通道大小都相关。 ……Prior to gas adsorption measurement, the zeolite samples were pretreated in vacuo at 623 K for 10 h. The adsorption isotherms of Ar at 87.3 K (boiling point of liquid argon) and of N2 at 77.4 K (boiling point of liquid nitrogen) were measured by BELSORP-max, which has three pressure transducers of 0.0133 kPa, 1.33 kPa and 133 kPa in full scale. …… From Zeolites to Porous MOF Materials – the 40th Anniversary of International Zeol ite Conf erenc e 选自“从沸石到多孔MOF材料”— 第40届国际沸石大会 R. Xu徐如人, Z. Gao,高滋 J. Chen and W. Yan闫文付 (Editors)等 . 2007 Elsevier B.V. All rights reserved.

因为水分活度对产品的化学反应能力、微生物的存活和抵抗能力影响很大，因此在肉和肉制品中水分活度的检测变得越来越重要。因此，水分活度对食品的保存非常重要。有多种方法保存食品，例如盐制、糖渍、干燥和冻干，能减少产品中的湿度对微生物的影响。以上所有方法增加了食品的渗透压，这也意味着水分活度的降低。

水分活度的定义 水分活度与水分含量（克水/克物质）不能直接等同，它指的是当前样品中自由水的体积和可用性。水分活度通过aw值评价，范围是0（绝对干燥）~1（简明湿度）。只有该组分能活跃的与环境湿度进行水分交换，并且有可能形成表面微生物生长的合适培养基，它才能影响微生物的稳定性。水分活度对食品中的化学反应也有重要的影响。

简介 本文描述了一种简单、快速、可靠的薄层色谱技术，用以检测尿液中羧酸四氢大麻酚（THC-COOH）。酰基葡萄糖酸酐经碱裂解后，用一项已证实的固相萃取技术，通过Isolute C8-(EC)柱进行样品预处理。用二氯甲烷-正己烷-甲醇（7+2+1）对60层WRF254s（0.1mm层厚）HPTLC硅胶板展开能获得最佳结果。该色谱的评估是通过HPTLC-UV和HPTLC-FTIR直接在线耦合，因此无需固蓝盐衍生或其他危害健康的偶氮染料。经证实羧酸四氢大麻酚的定性和定量检测限（UV：4 ng mL-1，IR：14 ng mL-1）可达20ng mL-1。

简介 南非钩麻的次生根在欧洲被用作治疗厌食症、消化不良的家庭急救药，同时被纳入自发退行性疾病的辅助治疗体系。这种植物的特征性环烯醚萜苷是钩果草甙。 我们发展了一种高效薄层色谱技术（HPTLC）对这种植物的提取物和次生根中的钩果草甙进行定量检测。使用的流动相为文献中描述过的一种优化形式，能提供光密度最均匀的定量点（在286nm波长下钩果草甙有最大吸收）。 我们比较了用文献发表过的HPLC技术和用硫酸-香兰醛显谱后获得的结果。为了检测分离是否完全，我们将南非钩麻提取物中获得的钩果草甙在显谱前后的谱图与钩果草甙标准品的对应谱图进行了叠加。

任务： 通常，表层水有其特殊性。依照当地下层土的地理特性，除了TOC含量高达10mg/l外，TIC含量也可能高达50mg/l。因此，需要一套可控的检测和（或）消除TIC的程序。

任务： 检测饮用水中TOC和（或）NPOC时主要问题是如何清楚分离非有机碳。通常，在多次检测中如果发现NPOC成分出现下降，就意味着程序起始的TIC外部分离不够有效。仪器自带的可控TIC分离程序将提供最佳的安全保证。

对海水的TNb检测 任务： 对海水进行TNb检测有助于评估沿海地区的海水营养状况。TNb可以通过催化燃烧样品来检测，但海水中的高盐成分常常导致催化剂失活，使这个过程尤为困难。 规格说明： 设备 样品 基础设备： Liqui TOC 体积： 1ml 模式： TIC/NPOC 稠度： 附件： 自动进样器 预处理： 步骤： 在35g/l氯化钠溶液中加入TNb总量为10mg/l的硝酸盐和氨水，就得到了一份人造标准品。这个标准品测量后与一份用作定标标准品的含10mg/l N的上层水溶液相对比。 如果氯化钠对TNb没有影响，两个样品的重复检测结果将会一致。 结果： 样品 TNb[mg/l] 相对标准差.[%] 重复性[%] 5ppm 氨水-N + 5ppm 硝酸盐-N 10.0 1.0 100 35g/l NaCl + 5ppm 氨水-N + 5ppm 硝酸盐-N 9.81 1.6 98 可以看出，两次结果在分析的不确定性区间内，氯化钠对检测没有影响。因此可以得出结论，海水的TNb检测与其他水样无异。I

The nickel–ceria (Ni–CeO2) nanocomposite coatings have been pulse electrodeposited from a Wattstype electrolyte containing nano-sized CeO2 particles produced by high-energy ball milling technique (HEBM). Sodium Lauryl Sulphate (SLS) has been added in the electrolyte as a cationic surfactant. The effects of the surfactant on the zeta potential, co-deposition and distribution of ceria particles in the nickel matrix and hardness of composite coatings have been investigated. Experimental results show that the addition of SLS up to 0.10 g/l increases the amount of co-deposited ceria particles in the nickel matrix and microhardness of the nanocomposite. However, when the amount of SLS in the electrolyte is more than 0.1 g/l, there is a tendency to form agglomerates of ceria particles in the nickel matrix resulting no further increase in hardness of the Ni–CeO2 nanocomposite coatings.

Complete hydrolysis of a protein to its component amino acids allows automated separation and quantification at the pmole to nanomole level. Although sequence information is lost, compositional data provides a protein specific fingerprint for identification purposes. Compositional data of peptides and proteins can be determined using an amino acid analyser. If the identity of a protein is unknown, the compositional data of the protein can be used in searching protein databases.

Lysine is an essential amino acid which means that it cannot be synthesized in the body at a sufficient rate to meet the physiological needs of the body, and therefore must be supplied by the diet. Lysine is one of the most important essential amino acids: it is a building block of protein and an important component in amino acid balance. It is a limiting amino acid in cereal grains and in some vegetable protein sources, therefore requiring synthetic supplementing to meet the animals needs. Lysine is a structural element of proteins; it is a vital component of the enzymes and is present in almost all the tissues of the animal. Because lysine is involved in a large number of metabolic processes it has a fundamental role in animal nutrition and animal health. Improvement in animal performance through better amino acid balance, better carcass quality, and prevention of lysine deficiency are some of the benefits associated with the right lysine content in the animal diet. For example, for piglets and pigs the use of synthetic lysine allows an increase in feed consumption and body weight gain; and an improvement in feed conversion and in nitrogen retention. Particularly with pigs, its use allows an improvement of the carcass quality. Using the Biochrom 30 buffer system, lysine can be accurately quantified in less than 10 minutes to enable adjustments to the formulation of feedstuff.

Phenylketonuria (PKU) is a genetic inborn error of metabolism, that is detectable during the first days of life with appropriate blood testing. The absence or deficiency of an enzyme that is responsible for processing the essential amino acid phenylalanine characterizes PKU. Without treatment, most infants with PKU develop mental retardation. Early detection of PKU can allow patient treatment to prevent mental retardation, as well as other associated problems. Treatment consists of a carefully-controlled pherestricted diet begun during the first days or weeks of life. Frequent blood monitoring of PKU patients is necessary, especially during infancy and early childhood when it is important to keep the blood phenylalanine levels at the safest level. Biochrom Amino Acid Analysers are widely used for the routine analysis of phenylalanine. Clinical laboratories have a continuous requirement for analyses of large numbers of samples. Rapid, accurate analysis is critical to meet the demand of the screening programmes. Improvements in peak resolution, accuracy, run times, and quantitation by using a dedicated instrument has enabled clinical laboratories to screen large numbers of samples per week. Using the Biochrom 30 Amino Acid Analyser phenylalanine can be rapidly and accurately quantified using norleucine as internal standard. The separation is carried out using a 20 cm x 4.6 mm high performance physiological column using buffer DII predominantly. The program enables 25 analyses to be performed a day. In addition tyrosine and homocystine are also well resolved thus enabling screening for the other metabolic diseases such as Tyronisis and Homocystinuria.

IsoPrime 稳定同位素质谱仪应用于：生态学，地理地质科学，海洋科学，环境科学，石油，石化，食品，化工，法检， 医学，考古等领域。 样品包括：土壤、农业样品、大气、水、石油、香料、酒、果汁、蜂蜜等。

IsoPrime 稳定同位素质谱仪应用于：生态学，地理地质科学，海洋科学，环境科学，石油，石化，食品，化工，法检， 医学，考古等领域。 样品包括：土壤、农业样品、大气、水、石油、香料、酒、果汁、蜂蜜等。

Reaction calorimetry is becoming more and more important, because the time from development to a marketable commodity needs to be shorter and shorter. Even at the beginning of the development process the procedure and safety has to be optimized. For this calorimetric data is needed. Depending on the system (with or without coolerbalance calorimetry) we deliver: * Reactor and cooler: power and heat curves * Accumulated heat after partial dosage * Adiabatic temperature increase through total heat or through * Accumulated heat at any time for reactor & cooler terms * Diagram of the kinetics for your reaction * At last also polymerization, crystallization and fermentation with higher accuracy