microFAST MC - Dual Loop Syringe Loading & Injection

The microFAST MC combines the advantages of the SC-µDX autosampler with single or dual loop FAST capabilities and syringe based sample loading/injection. The system accurately loads a loop and then smoothly injects the solution into a μFlow concentric nebulizer at defined rates from 5-1000 μL/min. The valve on the flow injection system selects from two discrete, parallel flow paths. This allows rapid switching between solutions with minimal dead volume between the valve and the nebulizer.

Features:
  • Total sample consumption
  • Syringe load micro volumes (5-1000 µL)
  • Syringe inject at desired flow rate (5-1000 µL/min)
  • Dual loop system
Benefits:
  • Reliably run small volume samples at 5-1000 µL/min
  • Dual loop for high throughput and reduced carryover
  • Stable injection profiles for precise isotope ratios
  • Combine with apex 2 or apex Ω for enhanced instrument sensitivity and low blanks


microFAST MC Syringe Loading and Injection Animation

Capabilities  Applications  Accessories  Specifications

Li isotope ratios are measured using the microFAST MC system. Syringe injecting 100 μL of sample at 20 μL /min provides nearly 5 minutes of steady state signal for isotope ratio analysis. External reproducibility is improved for the smallest absolute sample amounts (6ng) using low volume solution aliquots.

Syringe Loading & Injection


Presented at Goldschmidt Prague 2015; M. Paul Field, Sambuddha Misra, Aleksey Yu. Sadekov, and Nicholas S. Lloyd

δ7Li (6.3 ng Li per quintuplicate)


Presented at Goldschmidt Prague 2015; M. Paul Field, Sambuddha Misra, Aleksey Yu. Sadekov, and Nicholas S. Lloyd

Minimizing the amount of Nd required to obtain desired precision (> 50 ppm) and throughput for precious oceanographic samples is illustrated in two figures. First, internal precision is for plotted for variable amounts of Nd injected at 100 µL/min for two minutes. Less than 50 ppm (2 RSD) internal precision is obtained for 2 ng samples of Nd. Repeat analysis of reference materials JNdi and La Jolla indicate that the external precision for 2 ng of Nd is similar to the 50 ppm internal precision and appropriate for oceanographic applications.

Sample Amount


Presented at Goldschmidt Yokohama 2016; Nicholas S. Lloyd, Paul Watson, and M. Paul Field

Reproducibility for 2 ng


Presented at Goldschmidt Yokohama 2016; Nicholas S. Lloyd, Paul Watson, and M. Paul Field

The microFAST MC is used to load small volume samples, provide stable injection profiles and rapid washout for precise Pu isotope ratios.

Multiple Injection Profiles


Provided by Dr. Cole Hexel and Dr. Brian Ticknor at Oak Ridge National Laboratory

Plutonium Isotopes


Provided by Dr. Cole Hexel and Dr. Brian Ticknor at Oak Ridge National Laboratory

The microFAST MC and the apex Ω provide high precision potassium isotope ratios with greatly reduced uptake and wash times, thereby improving frequency of sample standard bracketing.

NIST SRM 70b Against BSW


Presented at Goldschmidt Paris 2017; Nicholas S. Lloyd, Grant Craig, Paul Watson, M. Paul Field, Leah E. Morgan, Danielle Santiago Ramos, and John A. Higgins

apex Ω and microFAST MC on Thermo Neptune


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