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| TOC Talk for Apollo 9000 Salt Sample Upgrade |
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 The following software upgrade was created to improve TOC analysis of samples containing salts. These changes will extend the amount of salty samples that can be run on Apollo 9000/9000HS.
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The sample expansion wait time was changed from 30 seconds to 0 seconds to prevent buildup of salt in the injection port. |
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All salt-water samples should be run at a temperature of 680°C to prevent devitrification of the combustion tube. |
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The injection volume may be decreased in any range to increase salty sample potential load. |
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The catalyst and combustion tube should be removed and cleaned every 15 to 20 grams of salt. The amount of salt build up can be determined by the following equation:
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Grams of Salt per Injection Volume |
| % of Salt = (Salt g/L) (1L/1000 mL) = Sample Salt Concentration g/mL |
| Sample Salt Concentration (g/mL) * Injection Volume (mL) = Grams of Salt per Injection Volume |
| The amount of salt per injection volume should be included in the total amount of salt injected into the combustion tube for every repetition. |
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Grams of Salt per Sparger Volume |
| The amount of salt per sparger volume is half of the injection volume. It should be included in the total amount injected into the combustion tube for every sample. |
An example of 25% salt solution with an injection volume of 0.2 mL: |
25% Salt = (250 g/L)(1L/1000 mL) = 0.25 g/mL
(0.25 g/mL)(0.2 mL) = 0.05 g of salt per repetition
0.025 g of salt per sample
( i.e. 100 samples run 3 repetitions each) |
(0.05 g of salt per repetition)(300 repetitions) = 15 g of salt
(0.025 g of salt per sample)(100 samples) = 2.5 g of salt
Total amount of salt in combustion tube = 17.5 g of salt |
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| Tips for Running Salt Samples |
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1.) |
Place a loosely wadded tuft (approximately 1/4" to 1/2" thick) of quartz wool on top of the catalyst in the combustion tube. |
2.) |
Change the Copper (Cu) and Tin (Sn) in corrosives scrubber when discolored from salt samples. |
3.) |
Choose the method range that is appropriate for your samples. |
4.) |
Decrease the injection volume to extend the amount of samples that can be run before cleaning the catalyst and combustion tube externally. The sparger volume should be changed to half of the injection volume. This can be accomplished through double-clicking the method id of the chosen method in the sample setup screen. Simply type in a new injection and sparger volume. Click 'OK' or 'Save'. |
5.) |
The injection port should be removed and cleaned when the combustion tube and catalyst are cleaned. Be careful to clean each opening on the injection port. |
6.) |
After the combustion tube is cool, the catalyst should be removed from the combustion tube along with the quartz wool. The quartz wool should be discarded and the catalyst should be placed in a beaker and rinsed with reagent grade. Swirling the catalyst in the beaker with reagent grade water will remove the salt build up on the catalyst. The combustion tube may be cleaned with laboratory glassware cleaning solutions and brush followed by reagent grade water rinse. Both the catalyst in the beaker and the combustion tube should be dried in an oven at 60°C to 100°C until dry. Follow the instructions in Chapter 7 of the Apollo 9000 User Manual for washing the catalyst and cleaning the combustion tube. |
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| Installation Instructions |
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1.) |
Download the file by clicking on the link below. When prompted, specify 'Save to Disk' and save the file to a formatted floppy disk. |
2.) |
Bring the disk to the PC running TOC Talk. |
3.) |
In TOC Talk, identify the running directory by going to the 'About' box, depress and hold the 'T' key down while clicking on the Apollo 9000. The second message to appear gives you the running directory. Write this down. |
4.) |
Exit any running copy of TOC Talk and run the file on the disk by clicking 'Start' 'Run' and typing in "A:\slt.exe" where 'A' represents the drive letter of your floppy drive. |
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When prompted, verify the correct directory the file will be extracted. If the directory form step 3 above was 'C:\Apollo' then the correct directory for extraction is 'C:\APOLLO' |
6.) |
Click 'Unzip' and when it finishes, click 'Close'. |
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