Multielement testing of soil samples provides valuable understanding of its yield potential. Essential elements are divided into macronutrients (required in larger quantities because of their structural roles in the plant) and micronutrients (required in smaller quantities because they tend to be involved in regulatory roles in the plant). Primary macronutrients, such as potassium (K) are most often in short supply in soils, requiring replenishment in the form of applied fertilizer. Deficiencies of secondary macronutrients, such as calcium (Ca) and magnesium (Mg) are less commonly encountered. Micronutrients include iron (Fe), manganese (Mn) , zinc (Zn), copper (Cu), and boron (B). The presence of any of the essential elements in excessive amounts may result in toxic effects. Accurate and timely analysis of soil samples is vital so action can be taken to improve the soil’s fertility if a nu trient imbalance is present or if there is a risk of environmental pollution due to excess elemental concentrations

Accurate elemental analysis of soils is extremely important for numerous reasons. Lead and cadmium are known for their adverse health and environmental effects. Phosphorus, copper, iron, magnesium are considered important macro and micro nutrients for plants and thus, these elements are of interest for agricultural science, crop selection and soil remediation studies. Titanium minerals in soil are also used as weathering indicators [1]. Laboratories that analyze soil and rock samples must use hydrofluoric acid (HF) during sample preparation to ensure complete dissolution, especially where silicate based minerals may be present. Standard glass sample introduction systems are not suitable for the introduction of HF digests unless the samples are neutralized prior to analysis as the free HF attacks and degrades the glass a nd quartz components. Unfortunately, the HF neutralization step reduces laboratory efficiency and introduces a potential source of contamination. Therefore, laboratories that routinely analyze samples prepared using HF digests prefer to work with

Managing the treatment and disposal of domestic sludge is an important activity and one that is highly regulated in many countries. After treatment, the effluent may be discharged leaving a mixture of water, organic solids and chemicals, nutrients, heavy metals, and inorganic ions. This sludge can be further treated and the resulting biosolids can then be applied to the land as a fertilizer, sent to landfill or incinerated. It is vital that the sludge or biosolids are tested and conform to regulatory levels in order to protect public health and the environment. The United States federal biosolids rule is contained in 40 CFR Part 503. The European Union Sludge Directive 86/278/EEC is expected to be revised as several Member States have enacted and implemented stricter limit values for heavy metals and set requirements for other contaminants. In this work, an Agilent 4200 MP - AES was used to deter mine major and minor elements in domestic sludge, following microwave digestion.

The elemental profile of river sediments provides valuable insight into the health of a river, as well as the wider environment. Some elements that are essential for the ecology of the river at trace levels e.g. manganese, copper and zinc, can be toxic at high concentrations. Traditionally, the concentration of elements in river sedi ments is determined via Flame Atomic Absorption Spectroscopy (FAAS). This technique has the drawback of requiring expensive and hazardous gases such as acetylene and nitrous oxide and also requires element - specific sample preparation that adds time and cost to the analysis. The novel Agilent 4200 Microwave Plasma - Atomic Emission Spectrometer (MP - AES) is the ideal alternative for laboratories looking to transition away from FAAS to a higher performance, lower cost and safer technique. MP - AES is a fast sequential, multielement analytical technique that uses a microwave - induced nitrogen - based plasma for sample excitation. The use of nitrogen eliminates the need for acetylene and nitrous oxide, which can

许多从事地下水、工业废水、土壤、污泥和沉积物等环境样品中元素分析的实验 室操作 ICP-OES 以美国国家环境保护局 (US EPA) 6010C 方法作为指导原则。这 些实验室期望提高样品通量并降低分析成本，但由于元素种类众多且在典型样品 中的浓度各不相同，因此使用光谱化学技术难以达到目标。 配备垂直炬管的径向 ICP-OES 或双向观测 (DV) ICP-OES 通常用于测定复杂环境样 品中的常量、微量和痕量元素。然而，Agilent 5100 ICP-OES 独特的同步垂直双 向观测 (SVDV) 构造能确保仪器在最适合特定应用的模式下运行（轴向、径向、垂 直双向观测或同步垂直双向观测），为建立方法和应用要求提供充分的灵活性 [1]。本研究采用在 SVDV 观测模式下运行的 Agilent 5100 ICPOES，依照 6010C 方法对河床污泥有证标准物质中的常量、 微量和痕量元素进行了分析。将 Agilent SVS 2+ 切换阀 系统与 ICP-OES 配套使用，以提高样品通量并减少每个样 品的氩气消耗量。6010C 方法是一套基于性能的指导原则， 用于分析土壤、污泥和沉积物中的 31 种元素。6010C 方法 要求 5100 SVDV ICP-OES 满足校准有效性、线性动态范围 (LDR)、方法检测限 (MDL) 以及光谱干扰检测 (ISC) 的性能 标准。

使用三通道Agilent 7890B 气相色谱系统测定炼厂气。通道1 使用了FID 检测器和氧化铝PLOT 色谱柱，用于测定从甲烷到C6+ 的烃类。通道3 使用氮气为载气，用于测定氢气。通道2 采用了G3507A 大阀箱(LVO)，在恒温条件下以氦气为载气，用于测定永久性气体和硫化氢。通道1 和3 为程序升温，而通道2 为恒温，其温度控制独立于主柱温箱。根据G3507A LVO 的温度和阀切换时间，分析时间从15 到18 分钟不等。

本研究描述了在中国雅安地震后，使用紧凑型Agilent 5975T 低热容气质联用系统对饮用水质量进行了分析。结果表明5975T 凭借其优良车载性、分析周期短和精准检测，成为应急反应分析的最佳选择。

安捷伦现已开发出基于Snifprobe 技术的创新型微吸附气体采样器(CTS)，能够在几秒到几分钟内完成现场气体取样。气体样品被吸附到毛细管捕集柱上后，使用热分离进样杆(TSP) 脱附毛细管柱上的样品并引入气相色谱(GC) 进样口。本法适用于分析挥发性(VOC)和半挥发性(SVOC) 化合物。

利用创新型安捷伦微吸附采样器(CTS)、热分离进样杆(TSP) 和Agilent 5975T 低热容气质联用仪(LTM GC/MS) 建立一种测定环境气体中亚硝胺类化合物的方法。可在短时间内现场完成气体采集，并利用TSP 将毛细管捕集柱所捕集到的亚硝胺直接脱附到GC/MS 进样口内。校准范围48-1600 ng，推测的方法检出限(MDL) 可低至1 ng。

通过Agilent 5977A 系列GC/MSD 开发了一种用于检测16 种PAH 的方法，方法检测限低至5 ppb，并且具有优异的线性 (R2>0.995) 和重现性 (RSD ~ 2%)。