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27 Cards in this Set
- Front
- Back
Preparation of reagent grade water |
1. Pre-filters 2. Activated carbon 3. Submicron filters 4. Distillation 5. Deionization 6. Reverse Osmosis |
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composed of glass or cotton microfibers |
Pre-filters |
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removes 98% of partiulate matter |
Pre-filters |
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removes organic materials & chlorine |
Activated Carbon |
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removes all particales & microbes larger than the spore size (~0.2um) |
Submicron filters |
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Oldest method of water purification |
Distillation |
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In distillation what compounds that precipitate ions in hard water? |
NH4OH, Ca(OH)2, Na2CO3 |
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May be ______ __ _____ distilled water |
double or triple |
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Ions have bee nremoved by the process of ion exhange or with commercial resins |
Deionization |
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Deinonization removes ____ and ___ ____ replacing it w/ Na |
Ca++ MG++ ions |
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Water is forced through a membrane (molecular filter) |
Reverse osmosis |
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In reverse osmosis ig removes ______ of organics, bacteria & other patriculate matter |
95-99% |
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In reverse osmosis ig removes 95- 99% of ? |
organics, bacteria & other patriculate matter |
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Glasswares [Factors determining thermal durability] |
1. Strain point 2. Annealing Point 3. Coeeficient of Expansion |
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T resulting to deformation due to heat stress |
Strain |
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T at w/c glass is heated in order to prevent brittlenesss |
Annealing point |
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Refers to the dimension change w/ temperature (Ideally, it should be low) |
Coeeficient of Expansion |
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Properties of glass |
1. Breakability 2. Thermal durability 3. Transparency |
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dependenton silicate anion content (greater amount - more durable) |
Breakability |
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Dependent on boron oxide, nickel, & ferric in content |
Thermal durability |
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dependent on ferric ion content only |
Transparency |
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Types of glass |
1. High thermal resistant glassware 2. High silica glassware 3. Boron-free glassware 4. Low-actinic glassware 5. Flint glassware 6. Borosilicate |
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Boroscilicate glass w/ low alkali content |
High thermal resistant glassware |
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Low coefficient of expansion |
High thermal resistant glassware |
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Used during heating or sterilization by heat |
High thermal resistant glassware |
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Provide example of high thermal resistant glassware |
Pyrex, Corex, Kimax |
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High silica glassware contains how much silica? |
96% silica |