/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q10P Question: 聽How do additives suc... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 25: Q10P (page 707)

Question: How do additives such as trienthylamine reduce tailing of certain solutes?

Short Answer

Expert verified

Additives such as trienthylamine reduce tailing of certain solutes.

They are used to mask free silanol groups.which improves peak shape by masking adsorption sites. Solutes are strongly bound to additives, which reduces tailing. Solutes are held strongly to additives which reduces their tailing.

Step by step solution

01

definition of silanol

Silanols have been used as nucleophilic partners in transition-metal catalysed carbon鈥揷arbon cross-coupling reactions, organocatalysts for carbonyl compound activation reactions, intramolecular guiding groups for C鈥揌 bond activation reactions, enzyme inhibitors, and bioactive compound isosteres.

They are used to mask free silanol groups.

which improves peak shape by masking adsorption sites.

Solutes are strongly bound to additives, which reduces tailing.

02

strongly additives

Solutes are held strongly to additives which reduces their tailing.

Hence,

They are used to mask free silanol groups which improves peak shape by masking adsorption sites. Solutes are strongly bound to additives, which reduces tailing. Solutes are held strongly to additives which reduces their tailing.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A reversed-phase separation of a reaction mixture calls for isocratic elution with 48%methanol 52%water. If you want to change the procedure to use acetonitrile/water, what is a good starting percentage of acetonitrile to try?

(a) use figure 25-28a select a tetrahydrofurn/water mobile phase strength of equivalent strength to 80%methanol.

(b)Describe how to prepare 1 L of this tetrahydrofurn mobile phase.

(c)what limitation would be imposed by the use tetrahydrofurn.
  1. According to equation 25-2if all conditions are constant, but particle size is reduced from3渭尘to0.7渭尘by what factor must pressure be increased to maintain constant linear velocity?
  2. If all conditions except pressure are constant, by what factor will linear velocity increase if column pressure is increased by a factor of 10?
  3. With 0.7渭尘particles in a 9cm脳50column, increasing pressure from 70MPato700MPa decreased analysis time by approximately a factor of 10while increasing plate count from
  4. 12000to4500059Explain why small particles permit faster flow without losing efficiency or,in this case,with improved efficiency.

use figure 25-17to suggest which type of liquid chromatography you could use to separate compounds in each of the following categories.

(a)Molecular mass <2000,soluble in octane

(b) Molecular mass <2000 ,soluble in methanol-water mixtures

(c) Molecular mass <2000 ,weak acid

(d)Molecular mass<2000 ,soluble highly polar

(e) Molecular mass <2000 ,ionic

(f)Molecular mass<2000,soluble in water in nonionic various

(g) Molecular mass<2000,soluble in water in water, variety of changes

(h) Molecular mass<2000,soluble in tetrahydrofuran

The chromatogram in Box 25-3 shows the supercritical fluid chromatography separation of seven steroids monitored by three detectors.

(a) In the middle chromatogram, ultraviolet detection provides near universal response for the steroids, whereas in the lower chromatogram the ultraviolet detector provides a selective response for a few of the steroids. How can ultraviolet detection act as either a selective or universal detector?

(b) Why is a sloping baseline observed at 210 nm, but the baseline is flat at 254 nm?

(c) Use the baseline disturbance early in the 254 nm chromatogram to measure tm. How does the measured value compare with that predicted using Equation 25-5 given that the column is 25 脳 0.46 cm and the flow rate is 2.0 mL/min.
See all solutions

Recommended explanations on Chemistry Textbooks

Inorganic Chemistry

Read Explanation

Nuclear Chemistry

Read Explanation

Making Measurements

Read Explanation

Physical Chemistry

Read Explanation

The Earths Atmosphere

Read Explanation

Ionic and Molecular Compounds

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.