Chromatograph Maintenance - Part IV Determination and Solution of Common Faults in High Performance Liquid Chromatography 1

(1) Change in retention time
1. Column temperature change column constant temperature, if necessary, need to configure the incubator
2. The equivalence and gradient are not well balanced with at least 10 column volumes of mobile phase equilibrium column
3. Buffer capacity is not enough with >25mmol/L buffer
4. Column contamination wash column every day
5. In-column conditions change stable injection conditions, adjust the mobile phase
6. The column reaches fast

Foundation cream is the foundation of makeup. It is a cosmetic used to adjust the skin tone, trim the surface texture of the skin, and cover facial imperfections.

The powdery texture foundation is the most common, and it looks soft and natural on the face, making it the best choice for daily makeup. When applying makeup, people don't forget to apply a foundation cream to themselves. Therefore, to a certain extent, foundation cream is the foundation of women's makeup. It is better than foundation, and it is more delicate and soft on the skin.

The most important thing for women's makeup is to strengthen the advantages of the face, showing a more beautiful side, followed by making up for the concealment of the face, making it invisible. The first step in makeup is to apply foundation. The role of foundation is to cover up the shortcomings on the face and refine the fine lines on the face. In addition, choosing a foundation with different shades can also emphasize the contours of the face, making the face more three-dimensional.

When applying makeup, first apply a basic moisturizer, then apply a layer of barrier cream to prevent the powder from clogging the pores, and then use a foundation cream suitable for your skin tone. Use a Foundation Brush to apply an appropriate amount of foundation cream and apply it to your face, starting from the cheeks, and gently pushing it from the inside to the outside; from the inside to the forehead, help stretch your wrinkles; tap lightly on the eye socket, nasolabial fold Finally, use your fingers to bounce on the face for longer-lasting makeup.

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