Atomic Absorption Spectrophotometer
Overview
Atomic Absorption Spectrophotometer (AAS) is a cornerstone instrument in analytical chemistry, designed to measure the concentration of specific metallic elements in samples. It leverages the principle that atoms absorb light at characteristic wavelengths, allowing precise quantification even at trace levels. Developed in the 1950s, AAS has become indispensable in industries requiring stringent metal analysis, such as environmental testing and pharmaceuticals. Modern AAS systems integrate advanced optics, automation, and software for enhanced throughput. They are categorized into flame, graphite furnace, and cold vapor types, each suited for specific elements and sensitivity requirements. Compliance with international standards like ISO and EPA methods ensures reliability for regulatory applications.
Structure and Working Principle
An AAS consists of four core components: a light source (hollow cathode lamp or electrode-less discharge lamp), an atomization system (flame or furnace), a monochromator, and a detector. The light source emits wavelengths specific to the target element, which are absorbed by atomized samples in the gaseous phase. The monochromator isolates the desired wavelength, and the detector quantifies the attenuated light intensity. Flame AAS uses a acetylene-air/nitrous oxide flame to atomize liquid samples, ideal for ppm-level analysis. Graphite furnace AAS, with electrothermal heating, achieves ppb-level sensitivity for smaller sample volumes. Cold vapor AAS specializes in volatile elements like mercury, employing chemical reduction to generate free atoms.
Key Features
High sensitivity is a hallmark of AAS, with detection limits as low as parts per billion (ppb) for elements like cadmium and lead. Multi-element lamps and sequential analysis modes improve efficiency, while background correction (e.g., deuterium or Zeeman) minimizes matrix interference. Modern systems feature touchscreen interfaces, automated sample changers, and cloud-based data management. Robustness is ensured through corrosion-resistant materials and temperature-stabilized optics. Some models offer hyphenated techniques, such as coupling with hydride generation for arsenic and selenium analysis. These features make AAS versatile for research, quality control, and environmental compliance.
Application Areas
AAS is widely used in environmental labs to monitor heavy metals in water, soil, and air, complying with EPA and WHO guidelines. In food safety, it detects toxic elements like arsenic in rice or lead in spices. Pharmaceutical manufacturers rely on AAS for raw material purity testing and drug formulation analysis. The metallurgy industry employs AAS for alloy composition verification and ore grading. Clinical labs use it to measure trace metals in blood and urine, aiding diagnoses of poisoning or deficiencies. Its adaptability across solid, liquid, and gaseous samples makes it a universal tool for elemental analysis.
Maintenance and Precautions
Regular maintenance includes cleaning the burner head, checking gas flow rates, and replacing hollow cathode lamps when intensity declines. Calibration with certified reference materials (CRMs) is critical before each analysis batch. Graphite tubes in furnace AAS require periodic pyrolysis coating to prevent sample carryover. Safety precautions involve proper ventilation for toxic fumes (e.g., cadmium or mercury vapors) and using personal protective equipment during sample digestion. Instrument downtime can be minimized by keeping spare parts like nebulizers and desiccants in stock. Annual service contracts with manufacturers ensure optimal performance.
B2B Procurement Guide
When procuring AAS for industrial use, prioritize suppliers with ISO 17025 accreditation for instrument calibration. Key selection criteria include detection limits for target elements, sample throughput (e.g., autosampler capacity), and software compatibility with LIMS. Brands like PerkinElmer, Thermo Fisher, and Shimadzu offer robust after-sales support and application-specific training. Total cost of ownership should factor in consumables (e.g., gases, lamps) and energy efficiency. Leasing options or refurbished units may suit budget-limited buyers. Request demo reports to validate performance with real samples. For regulatory labs, ensure the model meets standards like EPA 7000B or ISO 17294.
Related Manufacturers
- 主营：--
- 主营：水质检测仪、食品安全检测仪、蒸馏仪、光谱仪、发光成像系统、紫外分光光度计、测油仪、质构仪、顶空残氧仪、萃取仪、指数分析仪、总氮分析仪、辐射剂量仪、凝胶成像仪、流速流量计、微波消解仪、回流消解仪、气体分析仪、水质分析仪、明渠流量计、便携式露点仪、接触角测量仪、水质观测系统、手持式浊度仪、土壤检测仪
- 主营：--
- 主营：--
- 主营：--
- 主营：--
- 主营：水质检测仪、食品安全检测仪、土壤养分分析仪、原子荧光光度计、紫外分光光度计、COD测定仪、红外测油仪、气体检测仪、接触角测量仪、质构仪、蒸馏仪、微波消解仪、多参数水质分析仪
- 主营：--
- 主营：--
- 主营：食品安全检测仪、农药残留检测仪、土壤养分检测仪、ATP荧光检测仪、兽药残留检测仪、食品检测仪、水质检测仪、食品安全快检设备、食品添加剂检测仪器、食品微生物检测仪、农残快速检测设备、土壤重金属检测仪、多参数水质快速检测仪、大肠杆菌检测仪、亚硝酸盐检测仪器、病害肉检测仪、水产品安全检测仪、卡尔费休水分测定仪、鸡蛋品质检测仪
- 主营：--
- 主营：--
- 主营：--
- 主营：光谱仪、分光光度计、质谱仪、色谱仪
- 主营：测定仪、触摸屏、分析仪器、分光光度仪器、光度仪、实验室双光束光谱仪、光谱仪、外分光光度、光谱辐射计、分光检测仪、光谱分析仪、双光束光学系统、数显双光束仪器、台式紫外分光光度计、实验室光谱检测仪器、自动型可见分光光度计、分光检测设备、透光率光谱测试仪、实验室可见分光光度计、扫描型可见分光光度计、分析检测仪、水质检测仪、水质分析仪、检测分析仪、紫外辐射照度计
- 主营：多参数水质检测仪、红外测油仪、全自动凯氏定氮仪、一体化万用蒸馏仪、全自动液液萃取仪、食品安全检测仪、cod测定仪、便携式污水检测仪、水质理化箱、水质重金属检测仪、食品重金属检测仪、农残检测仪、国标COD消解器、萃取仪、滴定仪、浊度计、紫外测油仪、离子计、全自动电位滴定仪、土肥仪、土壤墒情检测仪、粗脂肪测定仪、粗纤维测定仪、水质微生物采样检测箱
- 主营：全自动凯氏定氮仪、红外测油仪、台式多参数水质检测仪、光度计、重金属检测仪、BOD测定仪、食品安全测定仪、农药残留检测仪、液液萃取仪、一体化万用蒸馏仪、电厂专用硅酸根检测仪、紫外测油仪、便携式多参数水质检测、磷酸根测定仪、粗纤维测定仪、测脂肪测定仪、全自动电位滴定仪、离子计、COD测定仪、余氯测定仪、紫外多参数检测仪、溶解氧仪、水质理化箱、综合重金属检测仪、滴定仪
- 主营：全自动凯氏定氮仪、红外测油仪、多参数水质检测仪、光度计、食品安全检测仪、cod检测仪、国标BOD测定仪、高锰酸盐指数分析仪、水质重金属检测仪、水分仪、土壤肥料养分检测仪、脂肪测定仪、粗纤维测定仪、紫外测油仪、便携式多参数检测仪、滴定仪、全自动电位滴定仪、电厂锅炉水硅酸根测定、磷酸根测定仪、农残检测仪、水质理化箱、水质微生物采样检测箱、溶解氧检测仪、全自动总磷测定仪、总磷检测仪
- 主营：骨密度仪、双能x线骨密度仪、超声骨密度仪、眼科激光治疗仪、制氧机、AED除颤仪、麻醉机、电子血压计、微波治疗仪、心电监护仪、血糖仪、肺功能仪、血氧仪、高分子夹板、血管鞘、急救包、喉镜、高压注射器、手术显微镜、听力筛查仪、视力筛查仪、呼吸机、牙科综合治疗台、临时起搏器、可视喉镜
- 主营：镀层测厚仪、矿石元素分析仪、合金成分分析仪、X荧光光谱仪、X射线光谱分析仪、ED-XRF光谱仪、XRF荧光光谱仪、手持式光谱仪、X荧光测硫仪、天瑞仪器光谱仪、波长色散X射线光谱分、能量色散光谱仪、全元素无损分析仪、石油焦成分分析仪、催化剂成分分析仪、ROHS2.0检测仪、重金属分析仪、水泥建材成分分析仪、X射线测硫仪、耐火材料成分分析仪、有毒有害物质重金属检、镀层膜厚仪、无机元素快速检测仪、镀层测试仪、地矿元素检测仪
- 主营：黑度仪、场强仪、检测仪、原子吸收分光光度计、风速仪、检测箱、外置泵、电磁兼容、自动采样器、流速监测仪、紫外辐照仪、水质监测仪、黑烟识别器、黑球指数仪、水质采样器、水质速测箱、风速测量仪、甲醛测试仪、明渠流量计、孔口流量计、微电脑控制器、电磁场测量仪、微生物采样器、手持式抓拍仪、恒温恒湿设备、气溶胶采样器
- 主营：甲醛释放量气候箱、水泥水化热测定仪、沥青蜡含量、光谱仪、高低温水浴、水泥生料易烧性压实机、人造板划痕试验仪、水泥原料易磨性球磨机、冻土冻结温度、混凝土粉样分层研磨机、家具平整度试验仪、土工布垂直渗透仪、小室法甲醛试验箱、人造板落球冲击试验仪、砂基透水砖透水速率、水泥胶砂抗冻性试验箱
- 主营：检测仪、声级计、智能红外、原子吸收分光光度计、静电能谱、职业卫生、水质自动、生物安全柜、电子流量计、水质采样器、红外测温仪、烟气测试仪、气体分析仪、烟尘采样器、明渠流量计、微生物采样器、气溶胶采样器、厨房油烟检测
- 主营：质谱仪、色谱仪、ICP、X荧光镀层测厚仪、能量色散X荧光光谱仪、气质联用、热裂解UPY90、ROHS检测仪、Rohs10项分析仪、镀层厚度测试仪、手持式矿石成分测试仪、膜厚仪、测厚仪、ROHS2.0分析仪、金属合金成分检测仪、便携式土壤重金属分析仪、古董陶瓷检测仪、贵金属含量检测仪、水泥成分测试仪、玻璃成分检测仪、耐火材料分析仪、黄金成分检测仪、环保材料测试仪
- 主营：自动电位滴定仪、电感耦合等离子质谱仪、热红质三联机、傅立叶变换红外光谱仪、紫外可见光分光光度计、电感耦合等离子光谱仪、荧光分光光度计、原子吸收光谱仪、便携式溶解氧测定仪、气相色谱仪、ICP-MS、GCMS气相色谱质谱、哈希HACH试剂、多参数水质分析仪、离子色谱仪、快速COD氨氮总磷分析仪、哈希仪器代理、罗威邦仪器代理、奥立龙代理、哈纳代理、在线水质分析仪
- 主营：生态环境综合执法装备、移动源执法监测设备、单人防护装备防护包、手持式光离子化检测仪、水样采样设备、氢火焰离子化检测仪、紫外线辐射强度计、便携式恶臭检测仪、手持式林格曼黑度仪、移动执法箱执法包、便携式粉尘检测仪、红外热成像仪、职业卫生监督快检设备、个人剂量报警仪、车用尿素检定仪、水质快检试剂包、手持热电风速仪、通用车载诊断仪OBD、工业内窥镜、车用尾气分析仪、移动执法包执法箱、测距仪声级计、卫生监督快速检测仪器、个人噪声剂量计、水质检测仪分析仪
- 主营：个人防护包、测距仪、移动执法包、手持式光离子化检测仪、个人剂量报警仪、多参数气体检测仪、水样采样设备、水质检测仪、手持热电风速仪、便携式土壤重金属检测、移动源执法监测设备、生态环境保护执法设备、单人防护装备、职业卫生监督快检设备、通用车载诊断仪、便携式油烟检测仪、粉尘测定仪、便携林格曼黑度检测仪、应急防护包、移动执法箱、职业卫生监督执法设备、生态环境保护综合装备、水质快检试剂包、testo德图
- 主营：红外测油仪、紫外测油仪、全自动凯氏定氮仪、分光光度计、BOD测定仪、多参数水质检测仪、食品安全检测仪、农残检测仪、水质重金属检测仪、一体化万用蒸馏仪、全自动液液萃取仪、土肥仪、cod检测仪、电厂专用硅酸根检测仪、滴定仪、蛋白质检测仪、手持式水质检测仪、全自动电位滴定仪、粗脂肪测定仪、粗纤维测定仪、数粒仪、溶解氧仪、电导率仪、磷酸根测定仪、水质理化箱、水质微生物采样检测箱