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Hit “esc” to quit hit any key to continue Flavor and Odor Analysis in Foods and Food Packaging.

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Presentation on theme: "Hit “esc” to quit hit any key to continue Flavor and Odor Analysis in Foods and Food Packaging."— Presentation transcript:

1 hit “esc” to quit hit any key to continue Flavor and Odor Analysis in Foods and Food Packaging

2 hit “esc” to quit hit any key to continue Presentation Overview Introduction to Large Volume Static Headspace (LVSH) Technique Advantages of LVSH/GC(MS) Analytical Procedure Examples of Food Products Analyzed Food Quality Determination by LVSH Summary

3 hit “esc” to quit hit any key to continue GC/MS Detection Limits vs Headspace Sample Volume PPM LODPPM LOD MINIMUM VOLUME REQUIRED (CC) Vol vs Conc. LoopPreconcentration

4 hit “esc” to quit hit any key to continue Large Volume Headspace Requires Preconcentration HP 5973 GCMS Volume ReductionLarge Volume Inlet or Autosampler

5 hit “esc” to quit hit any key to continue Large Volume Static Headspace Autosampler Introduces cc of headspace to the 7100 Preconcentrator Accommodates solids and liquids Detection limits 100x lower than conventional loop injection headspace “See what you can smell”

6 hit “esc” to quit hit any key to continue LVSH Sample Platforms and Enclosures Samples are placed in disposable vials, reducing potential for contamination of sample platforms. Sample Platforms use quick connects, simplifying removal for oven bakeout.

7 hit “esc” to quit hit any key to continue Advantages of Large Volume Static Headspace (LVSH) Cleaner. No aerosols or foaming to contaminate sample transfer lines Larger Sample Loading Low detection limits without sample heating. –Less chance of producing artifacts. –Sample remains in natural state. Ideal for kinetic / aging studies –Outgassing rates –Effects of Atmosphere and Storage Temperature Better recovery of reactive compounds –Strong carbon based adsorbents are avoided –Inert, Silonite tubing used throughout No sample fractionation (SPME)

8 hit “esc” to quit hit any key to continue Food and Beverage Analysis by Large Volume Static Headspace (LVSH) / GCMS Analysis HP 5973 GCMS L Stage Preconcentrator 7032L 21-Position LVSH/MiniCan Autosampler 4600 Multi-Channel Standards Diluter

9 hit “esc” to quit hit any key to continue 7032-LVSH / 7100 /5973 Large Volume Static Headspace Analyzer GC MS LVSH SL I/O M1 M2 M3

10 hit “esc” to quit hit any key to continue PCB Integrated wiring for improved reliability Modular design. Easy replacement of traps MFC downstream of traps 7100 Open Architecture

11 hit “esc” to quit hit any key to continue Silonite tubing used throughout. Complete heating of sample flow path. Easily accessed for trap and tubing replacement. External Heaters outside each cryotrap 7100 Heated Flow Path 7100 Preconcentrator

12 hit “esc” to quit hit any key to continue Silonite TM Fused Silica Lined Tubing

13 hit “esc” to quit hit any key to continue Silonite Tubing VOC Adsorption/Absorption Study Less adsorption of Diethylbenzene on Silonite tubing. No deactivation needed. Faster sample equilibration with tubing surface. Less potential for carryover. RESPONSERESPONSE Flush Time (Min.) Silonite Brand B Deact. Brand B

14 hit “esc” to quit hit any key to continue 7100 Water and CO2 Management Techniques Internal Standard Calibration Standard Glass BeadsTenax Cryogen in H2O Focuser To GC Helium PUMPMFC Helium Carrier Post-Injection Bakeout Sample

15 hit “esc” to quit hit any key to continue 3-Stage Flexibility for GCMS Analysis of Multiple Sample Types and Matrices Sample Type Mode Trap1 Trap2 Trap 3 - On-column focuser for capillary GC/MS

16 hit “esc” to quit hit any key to continue Improper Water Management 400cc VOC STD, Full Scan amu

17 hit “esc” to quit hit any key to continue Vinyl Chloride 100x Calibration Curve using Variable Volume / Single Standard Calibration

18 hit “esc” to quit hit any key to continue Fast Injection and Proper Water Management Minimizes Tailing of Polar VOCs Column: HP1, 60m, 0.32mm ID, 1um film. Flow rate: 1.5 ccm Carrier: He

19 hit “esc” to quit hit any key to continue Advantages of 7100 Multi-Stage Preconcentration Multiple Preconcentration Options Depending on Target Compounds and Matrix (CO2, ETOH) Reduced Temperature Trapping Minimizes Sample Stress, Maximizing Recovery of Thermally Labile Flavor and Odor Compounds Silonite Tubing Creates an Extremely Inert Sample Flow Path to Further Improve Recovery Demonstrated Recovery of Sulfur and Nitrogen Compounds

20 hit “esc” to quit hit any key to continue LVSH Analysis of Yuban Coffee - 100cc

21 hit “esc” to quit hit any key to continue LVSH Analysis of Banana - 100cc

22 hit “esc” to quit hit any key to continue 100cc LVSH Analysis of Dannon Raspberry Yogurt

23 hit “esc” to quit hit any key to continue 100cc LVSH - Coke/Pepsi Challenge Coke Pepsi

24 hit “esc” to quit hit any key to continue Analysis of 100cc of Headspace allows detection of VOCs indicating condition of food products. Monitoring changes in VOC ratios as food spoils allows quantitative evaluation of extent of spoilage. Once specific “Markers” are determined, remote headspace techniques can be used to predict food condition and time until spoilage in storage containers and warehouses. Using LVSH to Determine Product Quality Markers in Fruits and Vegetables

25 hit “esc” to quit hit any key to continue 100cc LVSH Analysis of Grapes 7032LVSH/7100/ CO2 2. Acetaldehyde 3. Ethanol Loop Injection Detection Limit

26 hit “esc” to quit hit any key to continue LVSH Analysis of Grapes - Scaled to show PPB Cmpds 1. Ethyl Acetate 2.Limonene IS (Loop Injection Detection Limit)

27 hit “esc” to quit hit any key to continue Ethyl Acetate concentration increases as grapes age, while naturally occurring Limonene drops off. The ratio of EA/Limonene is a good indicator of product quality Acetaldehyde, a non- desirable component in wine, is present even before the fermentation process begins. LVSH Analysis of Grapes

28 hit “esc” to quit hit any key to continue 1. CO2 2. Methanol 3. Ethanol 4. TCE cc LVSH Analysis of Lettuce Loop Injection Detection Limit

29 hit “esc” to quit hit any key to continue LVSH Analysis of Lettuce Ethanol, Dimethyl Sulfide, and Acetaldehyde show large increases as lettuce spoils Naturally Occurring Limonene drops in concentration The ratio of DMS to Limonene was a good indication of freshness

30 hit “esc” to quit hit any key to continue 1. CO2 2. Methanol 3. Ethanol 4. Acetone 5. 2-Methyl Furan 6. DHHN IS cc LVSH Analysis of Tomato Loop Injection Detection Limit

31 hit “esc” to quit hit any key to continue LVSH Analysis of Tomatoes - Scaled to show PPB Cmpds Multiple PPB Level Markers

32 hit “esc” to quit hit any key to continue Heavy aldehydes increased as food spoils The largest increase was from a semi- volatile tentatively identified as DHHN In this study, the ratio of DHHN to 2-Methyl Furan was determined to be an excellent indicator of product quality LVSH Analysis of Tomatoes

33 hit “esc” to quit hit any key to continue Chocolate Peanuts 100cc, LVSH 60m, HP1, 0.32mm ID, 1um 7032LVSH/7100/5973 Carob Peanuts 100cc, LVSH 60m, HP1, 0.32mm ID, 1um 7032LVSH/7100/5973 Chocolate vs Carob Peanuts by LVSH/GCMS Hexanal

34 hit “esc” to quit hit any key to continue Whole Garlic vs Garlic Powder by LVSH/GCMS Whole Garlic 100cc, LVSH 60m, HP1, 0.32mm ID, 1um 7032LVSH/7100/5973 Garlic Powder 100cc, LVSH 60m, HP1, 0.32mm ID, 1um 7032LVSH/7100/5973

35 hit “esc” to quit hit any key to continue Cheddar Cheese, Brand A 100cc, LVSH 60m, HP1, 0.32mm ID, 1um 7032LVSH/7100/5973 Cheddar Cheese, Brand B 100cc, LVSH 60m, HP1, 0.32mm ID, 1um 7032LVSH/7100/5973 Cheddar Cheese by LVSH/GCMS Toluene

36 hit “esc” to quit hit any key to continue MiniCan Samplers Allow Direct Sampling of Gas Phase Flavors and Odor Compounds Collection of Remote Headspace Samples Improves Monitoring Effeciency. MiniCan Samplers are Silonite TM Coated to reduce surface losses. Monitor Process Streams, Holding Tanks, Reactors, etc.

37 hit “esc” to quit hit any key to continue Four Models of MiniCans MC400 MC400L MC400S MC400V

38 hit “esc” to quit hit any key to continue 7032 Autosampler Gas Phase Analysis Using MiniCan Silonite Coated Samplers Surrogate Spiking

39 hit “esc” to quit hit any key to continue 5973/7100/ cc Injection 10 PPB Sulfur Std., ECTD CO2 2. H2S 3. COS 4. MeSH 5. DMS 6. CS2

40 hit “esc” to quit hit any key to continue 2-Day Stability Study of Sulfur Compounds in Fused Silica Lined vs Electropolished Canisters 7000 / HP5973 Data

41 hit “esc” to quit hit any key to continue 5-Point Sulfur Gas Calibrations H2S MeSH CS2 DMS

42 hit “esc” to quit hit any key to continue Support for R&D and QA Fully Characterize Products down to Olfactory Detection Limits Identify Good and Bad “Markers” in product or packaging Monitoring on-line (Sequence Looping) Monitoring at-line (Sampling Ports) –Solids, Liquids by LVSH –Gases by MiniCan Samplers

43 hit “esc” to quit hit any key to continue Conclusion Large Volume Static Headspace (LVSH) is a new analytical tool available to food and beverage Chemists which enhances the detection of headspace components using GC and GCMS analysis. Maintaining the sample in a more natural state allows the analysis of “normally occurring” odor and flavor compounds. Inert flow paths and reduced temperature trapping increases the range of analytes that can be recovered, including oxygen, nitrogen, and sulfur containing compounds.


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