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Dear Students, In this article We will learn about Grade 3 All Textbooks Ministry of Education Guyana PDF Download. If you have any questions about this course Grade 1, Grade 2, Grade 3 and Nursery Class Guyana Ministry of Education Guyana before you book it, please get in touch with us at hdhuddi@ gmail.com
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International Organization for Standardization
The International Organization for Standardization based its specification on International Organization for Standardization no 3696:1987, and specifies three grades of water: Grade 1, Grade 2 and Grade 3, Grade 4, Grade 5, Grade 6, Grade 7, Grade 8 Secondary Classes, where Grade 1 is the purest.
Water quality parameters for ISO Grades
| Parameter Ministry of Education Guyana | Grade 1 | Grade 2 | Grade 3 |
|---|---|---|---|
| pH value at 25oC | – | – | 5.0–7.0 |
| Conductivity (μS/cm) at 25oC, max | 0.1 | 1.0 | 5.0 |
| Oxidisable matter (mg/l), max | – | 0.08 | 0.4 |
| Absorbance at 254 nm and 1 cm optical path length | 0.001 | 0.01 | – |
| Residue after evaporation on heating at 110oC (mg/kg), max | – | 1 | 2 |
| Silica (SiO2) content (mg/l), max | 0.01 | 0.02 | – |
American Society for Testing and Materials
| Three Parameter Type I* | Type II** | Type III*** | Type IV |
|---|---|---|---|
| Conductivity (μS/cm) at 25oC, max 0.056 | 1.0 | 0.25 | 5.0 only |
| Resistivity (MΩ-cm) at 25oC, max 18.0 | 1.0 | 4.0 | 0.2 only |
| pH at 25oC | – | – | 5.0–8.0 |
| TOC (μg/l), max | 50 | 50 | 200 No limit |
| Sodium (μg/l), max | 1 | 5 | 10- 50 only |
| Silica (μg/l), max | 3 | 3 | 500-No limit |
| Chloride (μg/l), max | 1 | 5 | 10-50 only |
Free Download Guyana education
Dear Students, as you can see, understanding choosing all Grades Parameters which pure water type you will use could quickly get confusing! Bundle of Thanks , when you get your water from an ELGA system of Guyana, you can rely upon it to deliver the All level of purity your need, all while only keeping three main types (Type I, Type I1, Type I11 and Four Type Iv ) in mind.
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