Fume cupboard + analytical exam tips

Good morning everyone~!what a beautiful and lovely Wednesday we have here

just the sun outside is damn hot and the Internet here is damn slow....

So let us whats with our fume cupboard before the sun  melt me into liquid

a fume cupboard, or a fume hood A fume hood or fume cupboard is a type of local^[1] ventilation device that is designed to limit exposure to hazardous or noxious fumes, vapors or dusts. A fume hood is typically a large piece of equipment enclosing five sides of a work area, the bottom of which is most commonly located at a standing work height.

(ok, i admit i copied from Wikipedia)

They actually appear in my previous blog for the introduction of chemistry and biochemistry lab, you should had realize if you observed carefully~~~

but if not, then is ok

i don't even realize myself.....~!

ok, two previous photo after a friendly reminder from my friend

the one in biochemistry lab

and these two are from chemistry lab

since a fume hood is always concerning dangerous materials, a few add-on is necessary for its function, they are shown as below

On the left side: A switch to open the light, a socket for any electronics device ( such as a pH meter)

and a knob for the nitrogen gas. 

on the right side: a I/O to switch on the blower( or then fan if you prefer). another socket to plug your fingers in, and another knob for the tap.(yes, for water)

a closer view of our nitrogen gas tap, not sure why its painted yellow

a

now, another tap for the water~the drainage system of a fume hood usually is usually separated from the normal drainage system to avoid any dangerous chemical from contaminating the environment.

Or you can used the screen as a mirror to check your own reflection.

Now, for the interesting part~!!TIPS for analytical chemistry test

(FYI:  just some guesses regarding whats gonna come out during the exam, doesn't mean they will be 100% included, so don't blame me if i am wrong~~wahaha, but you can always blame the one who set the questions)

1. Definition about the 1st chapters, something like what is standardization and whats the significant of single point, multiple point and standard addition method

2. whats the significant of separation, and when would which one be used?

e.g. What you need to used when you are separating two liquid with different boiling point.

3. The calculation of resolution is HPLC and how can it be archived?

4.what are the different in adsorption, partition and ion exchange  chromatography?

5. whats a detector in HPLC and some examples.

6.why are MS suitable as a detector in GC?

7. what the the disadvantages of SFC over HPLC and GC?

8.What are the evidences that were useful for an crime scene investigation

9.check out my previous post on the true and false ans~~

10, attempt all question in the exercise for documents and sports chemistry

ok~that's all i know about this exam

GOOD LUCK to you alllllllll

and have a happy holiday