成人小网站,少妇bbbbb撒尿视频,国内自拍小视频

It not only solves all the disadvantages of rotary evaporators, especially for small and multiple samples, but also becomes a necessary instrument for every chemical laboratory. For samples that cannot be heated or even need to be cooled and concentrated, only a nitrogen blowing instrument can be used for concentration. At the same time, the temperature of the samples can be controlled and heated, and inert gases such as nitrogen can be used quickly and controllably Continuous blowing onto the surface of the sample to achieve rapid anaerobic concentration of the sample solution is a time-saving, convenient, and accurate method. Widely used in food safety, medicine, pesticide residue detection, clinical pharmacokinetics and other fields.

Product features of Ye Tuo YTST-24 water bath nitrogen blowing instrument (square):

Each air needle channel on the distribution room can be combined or used separately, and each air needle can be switched on and off separately. The height of the distribution room can be adjusted as needed.

Each gas flow rate can be individually adjusted to meet the different needs of users. At the same time, it overcomes the weakness of different gas flow rates in each gas path of the non adjustable nitrogen blowing instrument.

The self balancing suspension lifting system is cleverly designed to make the height adjustment of the distribution room more flexible.

Digital temperature controller, dual digital display, adjustable using PID technology and able to achieve over temperature alarm.

Components that may come into contact with solvents are made of 316 stainless steel material, which has a long service life and is easy to clean.

The entire machine can be placed in a fume hood for use.

Each model can be optionally equipped with a gas regulator.

The standard size of the test tube rack is generally the aperture φ 15mm, users of other specifications can pre order their aperture and arrangement.