MicroBlock™ Distillation System Operation & Instruction Manual MicroBlock-V System with Cyanide Glassware MicroBlock-R System with Ammonia Glassware Call 800.343.5319 or 843.881.6560 • www.environmentalexpress.
MicroBlockTM: Operation and Instruction Manual Dear Valued Customer, Contents: Thank you for purchasing a MicroBlock from Environmental Express. We pride ourselves on providing innovative products designed to improve accuracy, efficiency, and safety in your laboratory. Please take some time to read your product manual before using your MicroBlock.
MicroBlock™: Operation and Instruction Manual General Information Limited Warranty The MicroBlock from Environmental Express, Inc. is guaranteed to heat, hold temperature, and adequately perform specified laboratory distillations for a period of one year from the date of shipment. This warranty extends to parts, labor, and any approved transportation charges. This warranty applies only to damage or failure caused by normal laboratory use. Environmental Express, Inc.
MicroBlockTM: Operation and Instruction Manual General Information MicroBlockTM Safety Information 1. The Environmental Express MicroBlock should be set up and operated in a chemical fume hood with a face velocity of not less than 100 CFM. 2. Wear appropriate Personal Protective Equipment (PPE) suitable for use with caustic and corrosive materials. 3. Do not operate the MicroBlock in the vicinity of combustible material. 4.
MicroBlockTM: Operation and Instruction Manual Getting Started Parts Included MICROBLOCK HEATING UNIT Includes: Heater Block, Temperature Controller with Timer, Fuse Holder with 15 amp Fuse, Flowmeter, Power Relay, Fan with Thermostat, Water Manifold with Quick Disconnect Fittings, High Temperature Switch and Glass Breakage Drain Outlets. VACUUM FRONT SECTION Includes: (if purchased for cyanide operation) Vacuum Valves, Vacuum Barbs and Vacuum Manifold.
StirBase: Operation and Instruction Manual Getting Started MICROBLOCKTM Glassware and Parts Item No.
StirBase: Operation and Instruction Manual Getting Started Unpacking and Setup I. Unpack the heating unit and place it in a chemical fume hood with the temperature controller facing outward. 2. Unpack 10 glassware sets. The glassware is packed 5 sets per box. The glassware should be cleaned according to the protocol and assembled in the MicroBlock unit. If the chemistry being done requires the use of a frit, refer to page 12, paragraph 7.17 for frit cleaning. 3.
HotBlock: Operation and Instruction Manual Getting Started Instrument Controls and Description Control Location Description Red Lighted Rocker Switch Top Right on Unit A DPST switch that turns power on and off. Note: This switch does not control the cooling fan. Black Rocker Switch Right Side of Temperature Controller Enables the heater block circuit. When turned on, the Green Pilot Light is illuminated and heating is enabled.
Vacuum Connection Rubber Body Plug (High Temp Switch Inside) Flowmeter Water Inlet on Bottom Vacuum Valves 800.745.8218 / 843.576.1147 / www.environmentalexpress.
HotBlock: Operation and Instruction Manual General Information Simplified Temperature Controller Instructions Front Panel Key Functions Alarm Lamp Remote Set Lamp Set Point 1 Lamp Heater Fail Lamp Set Point 2 Lamp °F Indicator Process Display °C Indicator Set Point Display Percent Lamp Manual Indicator Hold Lamp The decimal point flashes when Self Tune is operating Keys are illuminated when pressed. Key functions are as follows: INDEX: Menu Navigation.
HotBlock: Operation and Instruction Manual Getting Started Manual Operation 1. Press the INDEX key to change to set-point display, the SV display will have SPI displayed. 2. Change the process set point (PV display) by pressing the UP ARROW or DOWN ARROW key to change the value, and press the ENTER key to retain it. 3. Press the INDEX key to return to the process / set point display. The unit will heat to this temperature and hold.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations Total Cyanide Distillation with the MICROBLOCKTM 1.0 SCOPE AND APPLICATION 1.1 This method replicates US EPA method number 335.4 titled “Determination of Total Cyanide by Semi-Automated Colorimetry”. It is applicable for the determination of total cyanide in drinking, ground, surface, and saline waters, as well as, domestic and industrial wastes, and soils. Figure 2 - Cyanide Glassware Cold Finger C5210 Slip Connector 1.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations Total Cyanide Distillation with the MICROBLOCKTM Continued 4.4 Sulfamic Acid – if Nitrates and Nitrites are present 4.5 Potassium Cyanide 4.6 Potassium Hydroxide 4.7 Reagent Water ASTM Type II or Equivalent 4.8 Boiling Chips – Environmental Express # C5249 Note: The toxicities for each of the reagents used in this procedure are not fully documented. Treat each chemical as a potential health hazard and limit exposure.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations Total Cyanide Distillation with the MICROBLOCKTM Continued 6.8 Potassium Cyanide, Working Standard Prepare a series of standards covering the working range. Dilute 10mL of the Intermediate Standard to 100µL with reagent water. Concentration of 1mL = 10µg CN. Prepare fresh daily or before each use. 7.0 PROCEDURE 7.1 Pipette 50mL of sample or an aliquot diluted to 50mL with reagent water into the MicroBlock Reaction Flask.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations Ammonia Distillation with the MICROBLOCKTM 1.0 SCOPE AND APPLICATION 1.1 This method covers the determination of ammonia in drinking, ground, surface, and saline waters and domestic and industrial wastes. Figure 3 - Ammonia Glassware Cold Finger C5210 Cap C5213, and PTFE-Faced Septa C5218 1.2 The applicable range is 0.01 to 2.0mg/L ammonia as N. Higher concentrations can be determined by dilution. 2.0 SUMMARY OF METHOD 2.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations Ammonia Distillation with the MICROBLOCKTM Continued 4.7 Reagent Water ASTM Type II or Equivalent, especially ammonia-free Note: Such water is best prepared by passage through an ion-exchange column containing a strongly acidic cation exchange resin mixed with a strongly basic anion exchange resin. 4.8 Boiling Chips, Environmental Express # C5219 5.0 EQUIPMENT AND SUPPLIES 5.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations 7.3 To a 50mL sample add 1N NaOH drop-wise with mixing and adjust to pH 9.5. 7.4 Transfer sample to the Reaction Tube, skirted, and add 2.5mL of borate buffer followed by a pinch of boiling chips. 7.5 To the Receiver Tube add 5-10mL of 20g/L Boric Acid or 0.2N H2SO4. If using the Snip & Pour concentrate pour the entire contents of the tube in the Reaction Tube.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations TOTAL Recoverable phenolics With the MicroBlock™ Continued 2.2 Phenol is used as the standard even though the various forms of phenol react differently with the colorimetric reaction. The result obtained represents the minimum concentration present in the sample. 2.
HotBlock: Operation and Instruction Manual MicroBlockTM Distillations TOTAL Recoverable phenolics With the MicroBlock™ Continued 6.3 Standard Phenol, Solution B Dilute 10.0mL of Standard Phenol Solution A to 100mL with reagent water. 1.0mL = 0.001mg phenol. 6.4 Standard Phenol, Solution C Dilute 10.0mL of Standard Phenol Solution B to 100mL with reagent water. 1.0mL = 0.0001mg phenol. 6.5 Sodium Hydroxide, 0.1 N [1+9] Dissolve 4.0g of NaOH in 1L of reagent water. 6.
HotBlock: Operation and Instruction Manual Troubleshooting Troubleshooting Problem Possible Cause Solution Red Lighted Rocker Switch not lit Unit turned off Turn on Red Lighted Rocker Switch Unit unplugged or no power to unit Plug unit into 120 VAC/20A outlet Main fuse blown Replace 15A/250V fuse Internal failure Call for service Red Lighted Rocker Switch lit Units with S/N 2056 and below High Temp Switch tripped Reset High Temp Switch Green Pilot Light not lit Hi
