Environmental Express Webinar Hot Block Systems Precision Heat
Environmental Express Webinar Hot. Block Systems – Precision Heat with Various Uses 12/08/15
Decades of Digestions – 1970 s � Hot plate � Fume hood � Gloves � Safety glasses
Decades of Digestions – 1980 s � Hot plate � Fume hood � Gloves � Safety glasses � Lab coat
Problems with Early Digestion Procedures � Sample contamination � Safety � Accuracy � Absence of uniform heating � Transfer steps
Decades of Digestions – 1990 s � Digestion methods improve � Environmental Express introduces Hot. Block. TM Digestion Systems
Benefits of Using Hot. Block™ Digestion Systems � Metals-free construction eliminates contamination source � Temperature uniformity results in time-based digestions vs. volume-based digestions � Samples of similar matrices finish digesting at the same time � Single use digestion supplies eliminate glassware, sample transfer steps, and multiple contamination sources
Benefits of Using Hot. Block™ Construction Teflon®-coated graphite block provides uniform heating � Kydex® housing is fireresistant and acid-resistant �
Benefits of Using Hot. Block™ Construction � Silicone heating mat evenly applies heat for temperature uniformity � Easy-to-use controller allows for precise temperature control
Hot. Block � Most basic application is heated digestion of samples � Metals digestions � ‘Block Digesters’ are specifically mentioned in 200. 2, 200. 5, 200. 7, and 200. 8
Hot. Block � Other digestions � Phosphorous – 365. 1 � Cr 6+ - 3060 A/7196 A � Nitrogen – Alkaline persulfate digestions SM 4500 N-C � Mercury – 245. 1
Hot. Block – Industrial Hygiene � Ghost. Wipe � Lead and Beryllium � Method requires ‘rigid walled container’ for transport
Stirring Capabilities � Some methods require stirring or agitation while heating � Hot. Block & Stir. Base allow for multiple samples to be heated and stirred at once � Hexavalent Chromium by SW 846 3060 A � ASTM F 963 – Lead in toys
Hot. Block Pro � Adds some automation to the digestion process. � Controller allows for ramping, soaking, changes in temperature, and automatic shut-off. � Can control up to 2 Hot. Block Pro blocks at once.
Hot. Block - Distillations � Simple. Dist � Suitable for ammonia and cyanide distillation � Phenol currently in development � Basic 12 place block � Fits other 50 m. L Hot. Block systems � Eliminates cooling water and most glassware
Hot. Block – Organic Extractions � Soil-Cell System Based on SW-846 3546 � Utilizes a Hot. Block rather than a microwave � Stainless steel cells contain the soil and solvent mixture � Creates same temperature and pressure conditions in the cell that the microwave creates in it’s cells � Working with EPA on global acceptance of apparatus �
Available Models 15 m. L cups � SC 196 - 96 wells � 50 m. L cups � SC 100 – 36 wells � SC 154 – 54 wells � C 6002 – 12 wells � 100 m. L cups � SC 150 – 25 wells � SC 151 – 35 wells � All versions, except 12 well, also available in Pro models.
Custom Hot. Blocks Custom blocks are available � Must fit into existing graphite footprint – 12”x 12” or 12”x 18” � Send us sample vessel to measure � May require one time additional tooling fee � � Examples � ISM � Multiple cup sizes in one block � Centrifuge tubes
Special Digestions There are times when a Hot. Block is not feasible � Hot plate allows for larger digestion vessels such as beakers � Important to keep the same type of construction and heating technology in the hot plate as the Hot. Block for the best performance �
Thank you for attending Questions? 12/08/15
- Slides: 19