核分析鉴定：样品净化及导入

Sample Purification DD Nuclear Forensics Sample Purification and Introduction Paul Field (Elemental Scientific) and Cole Hexel (Oak Ridge National Laboratory) ElementalScientific ICP|ICPMS|AA prepFAST MC The prepFAST MCTM is a fully automated， low pressure chromatography system that isolates elements ofinterest from the sample matrix and collects multiple discrete eluent fractions for precise isotopic analysis.The syringe-driven system allows sample loading， multiple acid washes， column conditioning and elutioncycles all at user-defined intervals (time， volume and flow rate). Features： · Fully automated ·Syringe control-Load exact volume- Dispense exact volume-Precise flow rates · All fluoropolymer flow path ·Multiple destination locations ·Flexible chemistry SC-4 DX top view with locations for Samplesand multiple fractions. Vial sizes， styles and rackconfigurations are flexible. For Inline Method Development Only Elemental Scientific would like to thank Dr. Cole Hexel and Dr. Brian Ticknor at Oak Ridge Micro Iniections20 microFAST MC The microFAST MC precisely and accurately loads a loop and then smoothly injectssolution to a uFlow concentric nebulizer at defined rates from 10-100uL/min. The valveon the flow injection system selects from two discrete， parallel flow paths for standardsand samples. This allows rapid switching between sample and standardsolutions with minimal dead volume between the valve and the nebulizer. Features Total sample consumption Eliminate waste Micro volume samples Micro flow rates Inject complete sample Dualloop system High sample throughput Pu Injection Parameters 220uL of sample 50uL/min flowrate ~4 minute sampleacquisition 1 minute totaluptake and washout 5 minute sampleto sample HighlTransport Efficiencv apex Q Desolvating Nebulizer The apex Q desolvating nebulizer is the highest performing ICPMS sampleintroduction system available. An innovative multistage Peltier-cooled desolvationsystem combined in series with a helical EPTFE fluoropolymer membranedesolvator gives maximum ICPMS signal while simultaneously readingthe lowest ratios of oxide and polyatomic ion interferences. Features Full software control .Additional gas Sweep gas · Spray chamber temperature ·Membrane temperature 10x to 20x improvement in sensitivity apexQ <0.01% Ce oxide Full Software Control Total Sample Consumption Pu CRMs (500 femtograms of sample) Ratio Certified SD (2 sig) Determined SD (2 sig) CRM 126 240Pu / 239Pu 0.02096 0.02073 0.00014 CRM 082 240Pu / 239Pu 0.047096 5.20E-05 0.04687 0.00041 Uranium Isotopes UIRMM 183 (400 picograms total sample) Ratio Certified SD (2 sig) Determined SD (2 sig) 233U / 238U <2e-7 1.31E-07 234U / 238U 1.98E-05 2.20E-08 1.97E-05 2.25553E-07 235U / 238U 3.22E-03 1.60E-06 3.22E-03 1.99508E-05 236U / 238U 1.48E-04 5.40E-08 1.42E-04 1.00401E-06 Sample Introduction Better than 1% 2o precision for Minimal to no radioactive waste Sub nanogram U samples Minimal sample requirements . Sub picogram Pu samples High sensitivity and low levels of detection ·High throughput Precise isotope ratios for nuclear forensics prepFASTMCNational Laboratory for providing results from the Thermo Scientific NEPTUNE Plus MC-ICP-MSNational Laboratory C Elemental Scientific World Communications DriveIOmaha， NE el： sales@icpms.com www.icpms.com prepFAST MC™是一个完全自动化,低压层析系统,分离出感兴趣的元素从样本矩阵和收集多个离散的洗脱液分数精确同位素分析。该注射器驱动系统允许样品加载、多次酸洗、柱调节和洗脱周期，所有这些都在用户定义的时间间隔(时间、体积和流量)。