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4

Important Safeguards

Sample Preparation Safeguards

• Run similar sample types with the same acid(s) and acid volume in each vessel.

• If mixing similar samples or blanks, mix them evenly throughout the turntable.

• Maximum sample weight varies per vessel size and sample type. See “Operating Parameters” for weights.
• Acid blanks cannot account for more than 25% of turntable when mixed with samples.

Vessel Safeguards

• Only use consumables, accessories, vessels and vessel components purchased directly from CEM or through its 

authorized dealer network.

• All vessel components must be dry prior to use.
• Always condition new liners and plugs.
• A minimum of 4 vessels per run is required. An error message will appear if <4 vessels are detected.
• Do not batch old liners with new liners unless new liners have been conditioned.
• Ensure vessels are assembled properly.
• Group liners with similar sample history and usage.

• Segregate liners for HNO

3

 and non-HNO

3

 applications.

• Do not use a new liner with a set of liners that has been run consistently until the new liner has been 

conditioned with that sample type.

• Bake out liners to remove residual HNO

3

 & NO

x

 gases.

• See "Liner Back Out Procedure" for details.
• Bake out liners if TempGuard

TM 

is triggered.

• The fully loaded turntable without sample may be heavy (>25 pounds (11 kg)). Use caution when lifting and 

loading into the cavity. Do not place fingers beneath the turntable when placing in the cavity.

Compounds Unsuitable for Closed Vessel Microwave Digestion

 

WARNING

 

CEM will not be responsible for damage to equipment and facilities or personal injuries resulting from 
microwave digestion of samples that are deemed unsuitable for closed vessel microwave digestion.

Acid decomposition of certain chemical compounds or types of samples constitutes unreasonable, hazardous 
misuse of CEM microwave digestion systems. The classes of compounds listed below are unsuitable for closed 
vessel microwave digestion because they are highly reactive with oxidizing acids and/or may become nitrated and 
potentially explosive. Absence of a particular chemical compound from this list does not imply microwave acid 
decomposition of such a sample is safe under all conditions. 

• Explosives (TNT, Nitrocellulose, etc.)
• Propellants (Hydrazine, Ammonium Perchlorate, etc.)
• Pyrophoric chemicals
• Hypergolic mixtures (Nitric Acid and Phenol, Nitric Acid and Triethylamine, Nitric Acid and Acetone, etc.)
• Animal Fats (Esters of glycerol capable of nitration and the formation of nitroglycerin or other nitrated organic 

compounds)

• Aviation Fuels (JP-1, etc.)
• Acetylides
• Glycols (Ethylene Glycol, Propylene Glycol, etc.)

Содержание MARSXpress 10 mL

Страница 1: ...MARSXpress 10 mL 20 mL 55 mL 75 mL Microwave Digestion Vessel Manual...

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Страница 3: ...er and Plug Conditioning 8 Non Nitric Acid Liner and Plug Conditioning 9 Perform a Digestion Vessel Assembly 10 Turntable Setup 12 Load and Perform a Method 13 Vessel Removal 14 Cleaning and Inspectio...

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Страница 5: ...tion as described below NOTE A NOTE is intended to provide emphasis on procedures that may be misinterpreted or overlooked or to clarify confusing situations CAUTION A CAUTION is intended to provide e...

Страница 6: ...take the guesswork out of method creation and sample preparation The MARS 6 requires software version 1 49 or newer to operate MARSXpress This manual is intended for use by both novice and experience...

Страница 7: ...All Acids and Acid mixtures excluding HF 210 C 210 C 210 C 210 C HF 180 C 180 C 180 C 180 C Maximum Hold Time 200 210 C 45 min 45 min 45 min 45 min 180 200 C 60 min 60 min 60 min 60 min 180 C 90 min...

Страница 8: ...if TempGuardTM is triggered The fully loaded turntable without sample may be heavy 25 pounds 11 kg Use caution when lifting and loading into the cavity Do not place fingers beneath the turntable when...

Страница 9: ...ortant Safeguards Perchlorates Ammonium Potassium etc Ethers Cellosolve Ethylene Glycol Phenyl Ether etc Lacquers Alkanes Butane Hexane etc Ketones Acetone Methyl Ethyl Ketone etc and Alcohols Methano...

Страница 10: ...s visit our website at www cem com A list of parts can be found on the Products page under MARS 6 WARNING Only use consumables accessories vessels and vessel components purchased directly from CEM or...

Страница 11: ...7 Vessel and Accessories Overview Vessel Components 1 3 2 4 Item 1 Liner 2 Vessel Plug 3 Cap 4 Sleeve Accessories Turntable Torque Tool Vessel Rack A 24 place outer row only turntable is available...

Страница 12: ...of tea leaves or appropriate sample into each liner Never add sample or liquid to liner with sleeve in place 3 Add 10 mL of HNO3 to each liner Use the acid to rinse the inside of the liner to ensure t...

Страница 13: ...it 15 minutes to allow pre digestion 5 Assemble and torque each vessel See Vessel Assembly for detailed instructions 6 Select and load the Xpress Clean method from the One Touch directory 7 Place vess...

Страница 14: ...TION Do NOT batch old liners with new liners unless new liners have been conditioned 4 Add the sample to the liner s 4 1 Inspect liners for abnormalities 4 2 Weigh and transfer the sample into the lin...

Страница 15: ...acing away from the user at all times Never look directly at the vent hole once it has been placed on the liner 8 Hold the vessel and tighten the cap using the provided preset torque tool until a sing...

Страница 16: ...mblies into the turntable one by one See Vessel Distribution section of this manual for optimal vessel distribution A minimum of 4 vessels per run is required View Important Safeguards NOTE The sleeve...

Страница 17: ...eded creating a new method 1 1 To view method parameters select the method and select the information icon located at the top of the screen 2 Close the instrument door 3 Select Start to run the method...

Страница 18: ...acids 2 Remove the turntable from the instrument Keep the vent holes facing away from the user when transporting the turntable 3 Remove the vessel assemblies from the turntable one by one keeping the...

Страница 19: ...10 mL of acid that had been used for sample digestion HNO3 HCl H2 SO4 H3 PO4 or HF 4 2 Prepare vessel and turntable as outlined in manual 4 3 Select and run the Xpress Clean method in the One Touch di...

Страница 20: ...eeves Sleeves should be smooth and golden brown Discard sleeves that are distorted or flared Discard sleeves that have stains on the ends This occurs when liquid acid wicks up into the composite layer...

Страница 21: ...mber of Vessels Vessel Distribution 1 16 Inner row only even distribution 17 24 Outer row only even distribution 25 40 Inner and outer rows even distribution CAUTION A minimum of 4 vessels per run is...

Страница 22: ...thods 2 Select at the top of the screen to begin creating a One Touch Method 3 Select Method Name and enter in a name 4 Select Temperature and enter the desired temperature 5 Select Sample Type and ch...

Страница 23: ...ion of this manual Wipe inside of MARS cavity including the sensors with a lint free damp cloth Inspect liners plugs caps and sleeves See Cleaning and Inspection for acceptable wear on these component...

Страница 24: ...r Bake out Procedure to reduce differences in liners Do not batch old and new liners Run in separate turntables Uneven bar graphs during run Not enough similarity in sample type or sample weight Selec...

Страница 25: ...he US or 704 821 7015 and ask for Analytical Support or email MARS applications support at analytical support cem com Technical Support CEM is proud to provide technical support from a team of special...

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Страница 28: ...ue de Saclay 4 rue Rene Razel 91892 ORSAY Cedex 33 01 69 35 57 80 Fax 33 01 60 19 64 91 info fr cem com Germany Austria Switzerland CEM GmbH Carl Friedrich Gauss Str 9 47475 Kamp Lintfort 49 2842 9644...

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