Qualitative basis and qualitative method for gas chromatograph analysis

Chromatographic analysis of gas chromatographs includes chromatographic qualitative analysis and quantitative analysis. Today, for the qualitative analysis of the gas chromatograph and the qualitative analysis method for the chromatographer reference exchange.

(I) Qualitative analysis of gas chromatograph: The main function of gas chromatography is not only to separate the various components in the mixed organic matter, but also to qualitatively and quantitatively analyze the results. The so-called qualitative analysis is to determine what organic components are separated, and quantitative analysis is to determine the amount of separated components. Chromatography is far less qualitative than other organic structure identification techniques, but it is far superior to other instrumental methods in quantitative analysis.

After the organic matter enters the gas chromatograph, two important test data are obtained: the peak value and the area of ​​the chromatographic peak, so that the gas chromatograph can be qualitatively and quantitatively analyzed based on the two data. The peak retention value is the basis for qualitative analysis, and the peak area is the basis for quantitative analysis.

(II) Qualitative analysis method of gas chromatograph: The qualitative analysis methods of gas chromatography mainly include retention value qualitative method, chemical reagent qualitative method and detector qualitative method. Gas chromatographic retention values ​​are available in both retention and retention volumes, and retention times are now used as retention values ​​in most cases. Under the same instrument operating conditions and methods, the same organic matter should have the same retention time, ie peak at the same time. But it must be noted that organics with the same retention time are not necessarily the same.

Gas chromatographic retention time qualitative analysis method is to compare the retention time of organic sample components with the retention time of known organic materials under the same instrument and operating conditions. If the two values ​​are the same or within the tolerances allowed by the experiment and the instrument, It is presumed that the unknown component may be a known comparative organism. However, because the same organic matter has a large difference in retention time between different chromatographic conditions and instruments, the use of retention time values ​​to characterize chromatographic separation components can only give a preliminary judgment. In most cases, other methods are needed. Further confirmation. One of the most common methods of confirmation is to add possible organics to an organic sample and perform a gas chromatograph. If the organic sample does contain components of known organics, the corresponding peak will increase. By comparing the changes in the peaks of the two chromatograms in this way, it is possible to determine whether the preliminary preliminary inference is correct.

Lip Gloss

Lip gloss is a general term for a category of cosmetics for the lips. Viscous liquid or thin body paste, rich in various types of highly moisturizing oils and glitter factors, contains less waxy and color pigments. Clear and translucent, moisturizing and thin; moisturizing lips with strong three-dimensional feeling after coloring; especially outstanding in pursuit of special makeup effects.

Lip gloss use
"The lips are not used to talk, but to be sexy!" This sentence comes from the mouth of a French supermodel, which shows how important the lips are to a woman. Perhaps you always think that your lips are not full, the shape of the lips is not perfect, and the peaks of the lips are not three-dimensional ... In fact, these are irrelevant. The really attractive lips are the ones that look tender and soft, and the color is naturally ruddy, and these can be achieved only through a high-quality lip gloss and a series of skilled application methods.

History development
In ancient times, Cleopatra Cleopatra dyed her lips with a mixture of beeswax and crushed insects and carmine. Since then, women have always been obsessed with highlighting lips as an important facial feature. This practice has been popular for centuries because of differences in social acceptance. It wasn't until Hollywood stars really turned lipstick into a beauty necessity. Since the launch of Lancome's first lip gloss in 1998, the lip makeup has become more colorful, and since then, the lip gloss has gradually replaced the matte lip gloss. The packaging of this slender vial, with its natural luster like enamel and pearl and super lustrous lip gloss, is becoming more and more popular with consumers. [1]
Product Usage
The use of lip gloss can show women's sexy, charming, and at the same time achieve the role of moisturizing and protecting the lips, but also increase the beauty of the face, modify the contour of the lips, is one of the essential beauty cosmetics for modern women.
Product Categories
Crystal lip gloss: Transparent crystal lip gloss is extremely popular with young women, especially in warm seasons, it will add infinite charm to your transparent makeup. The resin component in the lip gloss makes it stick to the lips for a long time without being absorbed. Can be used alone or on top of a lipstick. After use, it seems that a bright layer of lip oil is applied to the lips, which looks crystal clear and transparent, making the lips long and fresh.
Light-colored lip gloss: It is a translucent lip gloss, which has rich colors and also has a luster effect. This light-colored lip gloss will form a natural and slightly transparent color on the lips, looking plump and beautiful. In particular, wine-red and light-red light-colored lip glosses have a rosy effect, which makes users look white and red, healthy and natural.
Bright lip gloss: The color is more intense than the first two, suitable for fragrant makeup and use on grand occasions. Its translucency is slightly worse, and it can cover the original color and even lip lines of the lips after application.
Pearlescent lip gloss: Adding sparkling pearl powder to the lip gloss makes lips look like the stars, especially under the light of the ball, it is more dazzling, luxurious, and the effect is longer .
Dyed lip gloss: It will be printed on the mouth and cannot be wiped off. Liquid lip gloss, containing jojoba oil, absorbs quickly, enhances moisturizing effect and elasticity, can be used before lipstick, or used alone. Compared with regular lip glosses, dyed lip glosses are more natural in color and more waterproof after use.
Different people may not have the same feelings about the same brand of lip gloss. Here is just a reference. Which lip gloss is really the "best" in your mind, and you may not know it until you try it yourself.
1) Apply on natural lips. Dip a light-colored lip gloss with a lip brush, apply it in the center of the lips, and then lightly blur. It can feel cold and fresh in the hot summer.
2) Pair with blush. Choose a lip gloss brush of the same color as the blush on your lips to show that your makeup is professional.
3) Apply on lipstick. Apply a layer of lipstick and then a layer of lip gloss to make your lips thicker and brighter.
4) Apply on the center of the lips. First outline the shape of the lips with a lip liner, apply lipstick, and then apply the lip gloss to the center of the lips. It's a very stylish application with a charming personality.
The lip gloss should not be applied too thickly, so that it is easy to remove makeup, and even fade when drinking water and talking. In addition, apply a thin layer of lip gloss, but the lip gloss will stay longer, and it will not feel greasy.

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