پاورپوینت درس ایمنی در آزمایشگاه جلسه ششم (pptx) 23 اسلاید

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نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )

تعداد اسلاید: 23 اسلاید

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درس ایمنی در آزمایشگاه جلسه ششم Flammable Š&combustible Oxidizer Water-reactive Pyrophoric Shock-Sensitive and Friction-Sensitive xplosives Š Compressed gas Cryogenic Liquids خطرات فیزیکی مواد شیمیایی(Physical Hazards of Chemicals) Cryogenic Liquids مایعات برودتی A cryogenic liquid is a liquid with a boiling point that is less than or equal to -90 oC at (1 atm) pressure. Cryogenic fluids, such as liquid air, liquid nitrogen, or liquid oxygen, are used to obtain extremely cold temperatures. Most cryogenic liquids are odorless, colorless, and tasteless Cryogenic liquids can cause fires (e.g., liquid oxygen or liquid hydrogen) Explosions embittlerment of structural materials Asphyxiation tissue destruction Review Questions A flammable liquid will emit enough vapors to be ignited by a spark source at temperatures: a. above absolute zero b. above 22 °C (70 °F) c. below 38 °C (100 °F) d. above its freezing point A flammable liquid will emit enough vapors to be ignited by a spark source at temperatures: a. above absolute zero b. above 22 °C (70 °F) c. below 38 °C (100 °F) d. above its freezing point Cryogenic liquids can: a. displace air in a lab b. freeze skin c. embrittle materials d. explode e. all of the above Cryogenic liquids can: a. displace air in a lab b. freeze skin c. embrittle materials d. explode e. all of the above خطرات سلامتی مواد شیمیایی Health Hazards of Chemicals راههای ورود مواد Routes of Entry فاکتورهای در معرض خطر قرار گرفتنToxic Exposure Factors نوع خطر Types of Health Hazards خطرات درکمین دستگاه تناسلی Reproductive Health Hazards مواد مضر ویژه Particularly Hazardous Substances راههای ورود مواد Routes of Entry  استنشاق Inhalation (آستانه بو) تماس چشم و پوست Skin and Eye Contact rinse the affected area with water for at least 15 minutes خوردن Ingestion Ingestion can occur by failing to wash hands before eating or drinking, eating or drinking contaminated food or beverages in the work area, or touching the mouth with contaminated hands. Workers can easily reduce the risk of ingestion by not eating, drinking, smoking تزریق Injection Another possible route of exposure to chemicals is by accidental injection which can occur by needle sticks or through accidents with broken glassware or other sharp objects that have been contaminated with chemicals.