In some occasions, you will have to write an essay in the extremely short amount of time on the exam in college or high school. Also, you may be a little bit of a procrastinator, and find yourself in a situation when the paper is due tomorrow morning, and you have not even chosen the topic yet. Even though a last-minute essay cannot look as great as a work prepared successively and carefully within the whole time given, you still have a chance to submit a decent paper. The working process will require your full attention and a lot of effort, even if you are assigned a simple essay. However, if you learn the next few tips, the essay writing will seem significantly easier and feasible even when you are short on time.

Firstly, clean up your working space to get started. Make sure you have everything you need on the table, take a pen, a few sticky notes, your laptop, and read through the assignment requirements. In case no prompt is given, search for good essay topics, and pick a few uncommon and interesting ones you will be able to write about. Making a final choice, think which topic is the most relevant to your current studies and will not take too much to research.

Afterwards, look for the most trustworthy sources or the ones you are certainly allowed to use. If you are not sure, access the online library or any free services where you can look for the books and articles for your essay. Use sticky notes to write down the information and put them in front of you to see how much data has been gathered and if you need to continue researching. Reread these notes from time to time and cross out the info you do not find relevant anymore.

When you have the data you need to produce a quality work, it is crucial to think about the structure of the future paper. If you are not sure how to write an essay outline properly, check what your essay type is first. Each type is organized differently, so you need to look up the structure every time you are given an essay homework. You can also search for an example of the essay on your topic, and adhere to its outline. No matter what kind of essay you are going to write, it is important to start with a thesis statement. It should declare what problem you will review in the paper, and which facts or arguments you will use to do it professionally. As these arguments will be discussed in the main part of the essay, outline the body paragraphs and put down a few sentences with the rough description of each paragraph. Think of the way you will engage the reader in the introduction, and which thought will be conclusive for the paper. When the direction of the work is clear from the outline, use it to draft the first version of the essay.

If you are not used to model essay writing, do not worry - your draft should not necessarily look like a masterpiece. It is only the depiction of your thoughts, and as you will have them written down, it will be easier to create a good essay. There is no best way to write an essay, so trust the working methods you usually use. You may like taking short breaks once in a few minutes, or write everything in one sit - just make sure to keep the focus on writing and avoid the urge to call a friend or watch something online. Thus, you will finish the paper faster, and will not feel guilty for engaging in other activities afterwards.

Do not forget to go through the essay a few times after the completion. Everyone makes typos and mistakes by accident, but it is about you to find and fix them before your teacher does. If you need help with an essay editing, try asking a friend or a family member to read and analyze your work. Also, you can order editing services in case your paper needs to be perfectly polished so that you can submit an ideal essay and get an excellent grade.

As these steps are simple to follow, you will not have any problems coping with an essay on time. Try the whole procedure at least once, and you will not have to use any other tips preparing an essay paper during your studies!

What is pump in HPLC?

An HPLC pump is also called a “solvent delivery system.” The purpose of the pump is to maintain a constant flow of mobile phase through the HPLC system. This is accomplished regardless of the back pressure caused by the flow resistance of the HPLC column.

What is the unit of pump pressure in HPLC?

Operating pressure limits for regular HPLC systems (not UHPLC) are often in the range of 5800 – 7000 psi (400 – 500 bar), which is usually also appropriate for HPLC column hardware and (fully porous particle) packing material.

Which is the most popular pump used in HPLC?

There are two common types of HPLC pumps: reciprocating pumps and syringe pumps. Reciprocating pumps are by far the most common pump used and can have single piston or dual pistons.

Why are multiple pumps used in HPLC?

Dual-Piston Pumps have two pistons operating in parallel, fully out-of-phase with each other, to produce naturally smooth fluid flow. This is critical for many analytical chromatography applications.

What is stroke volume in HPLC?

■Stroke Volume. The default stroke is 132μL, but when the movement of the plunger (Stroke Volume) is large and the baseline fluctuates due to mixing, it can be expected that the baseline fluctuation will be reduced by setting a small stroke volume. However, if it is set small, the maximum flow rate will also be small.

Why C18 column is used in HPLC?

C18 is octyldecylsilane and contains 18 carbons bound to the silica. So they have more carbons and a longer carbon chain than C8 (8 carbons) or C4 (4 carbons). Because of the extra carbons, C18 has a larger surface area that the mobile phase has to travel across.

Why does HPLC need high pressure?

Smaller particle sizes [<10 microns] are required to improve separation power. However, smaller particles have greater resistance to flow, so higher pressures are needed to create the desired solvent flow rate.

Why is pressure important in HPLC?

Yet pressure is one of the most important parameters in successful HPLC. The role of pressure is to drive the mobile phase through the small particles packed into the chromatographic column.

How many types of HPLC pumps are there?

There are three main types of HPLC pumps.

Why do we use wet prime in HPLC?

Wet prime pumps (often called ‘self-primers’) require the casing to be filled with water prior to the first start-up only. After that, the liquid will always remain in the pump volute, so the suction hose can run dry without damaging the pump or seals.

What is void volume in HPLC?

The HPLC column void volume denoted Vm or V0 is in simple terms the volume of the mobile phase in the column. It is the part of a fraction that when added to the volume of the stationary phase makes up a whole fraction or 100% volume.

What is tailing factor in HPLC?

Symmetry factor (S, also called “tailing factor”) is a coefficient that shows the degree of peak symmetry.