SILICA - 912 ads

Wednesday, October 23, 2019

Qingdao Tianwei Casting (located in Qingdao,Shandong,China) is very specialized in investment casting,precision casting and sand casting to produce all types of engineering/metal parts. We can cast more than 100 kinds of alloys. As for investment casting(lost-wax casting method),we...

Wednesday, October 23, 2019

Qingdao Tianwei Casting (located in Qingdao,Shandong,China) is very specialized in investment casting,precision casting and sand casting to produce all types of engineering/metal parts. We can cast more than 100 kinds of alloys. As for investment casting(lost-wax casting method),we...

Wednesday, October 23, 2019

Qingdao Tianwei Casting (located in Qingdao,Shandong,China) is very specialized in investment casting,precision casting and sand casting to produce all types of engineering/metal parts. We can cast more than 100 kinds of alloys. As for investment casting(lost-wax casting method),we...

Wednesday, October 23, 2019

Qingdao Tianwei Casting (located in Qingdao,Shandong,China) is very specialized in investment casting,precision casting and sand casting to produce all types of engineering/metal parts. We can cast more than 100 kinds of alloys. As for investment casting(lost-wax casting method),we...

Wednesday, October 23, 2019

Qingdao Tianwei Casting (located in Qingdao,Shandong,China) is very specialized in investment casting,precision casting and sand casting to produce all types of engineering/metal parts. We can cast more than 100 kinds of alloys. As for investment casting(lost-wax casting method),we...

Tuesday, October 22, 2019

Qingdao Tianwei Casting (located in Qingdao,Shandong,China) is very specialized in investment casting,precision casting and sand casting to produce all types of engineering/metal parts. We can cast more than 100 kinds of alloys. As for investment casting(lost-wax casting method),we...

Friday, October 18, 2019

The vapor permeability of leather is evaluated by means of measuring the weight of water-vapor that permeates to specimen per unit time and per unit area. The main functional components includes: testing holder clamp, ventilation fan, control panel with functions of switch, time setting...

Thursday, October 17, 2019

As national powder R&D center, GUIKUANG has made much efforts and contributions for the development of powder industry more than 40 years. Raymond mill has been through decades of history in China. As one of earliest Raymond mill manufacturers, GUIKUANG keeps pace with the times...

Sunday, October 13, 2019

Quantity : 8000PCS - Price : 3-50USD

Specification of JH-D03 BTE FM Balanced Armature Loudspeaker Open Fit Hearing Aid Hearing Amplifier Max Sound Output 130±3dB Sound Gain 40±5dB Total Harmonic Wave Distortion 500HZ<3%</span> 800HZ<5%</span> 1600HZ<1%</span> Operation Current/mA...

Sunday, October 13, 2019

Quantity : 8000PCS - Price : 3-50USD

Specification of JH-907 ITE Mini Hearing Aid Hearing Amplifier Max Sound Output 120 ± 5dB Voltage 1.5V Sound Gain ≥35dB/28 Battery size A10 Total Harmonic Wave Distortion ≤5% Battery capacity/Mah 100 Operation Current ≤6mA Operation current/mA 3.5 Frequency...

Saturday, October 12, 2019

The stationary phase, commonly known as the fillers, is the most central part of chromatography. People need to determine three aspects of stationary phase information in turn before determine how to select the kind of the stationary phase of the flash purification column. They are matrix type...

Thursday, October 10, 2019

The essence of the chromatographic process is the process of distributing the equilibrium of the molecules of the substance to be separated between the stationary phase and the mobile phase. The distribution of the different substances between the two phases will be different, which...

Wednesday, October 09, 2019

Flash column chromatography is an easy and fast method to separate the complex mixtures. It can not only make the separation effect better but also shorten the time. How to put the sample into the flash column is of high importance in the preparation process of flash column chromatography...

Wednesday, October 09, 2019

Solid phase extraction (SPE) is used to reduce sample matrix interference and improve detection sensitivity. The separation selectivity of the solid phase depends on the retention strength of the components that can be retained, so the selection of the solid phase will depend on the...

Tuesday, October 08, 2019

The essence of the chromatographic process is the process of distributing the equilibrium of the molecules of the substance to be separated between the stationary phase and the mobile phase. The distribution of the different substances between the two phases will be different, which...

Monday, September 30, 2019

As national powder R&D center, GUIKUANG has made much efforts and contributions for the development of powder industry more than 40 years. Raymond mill has been through decades of history in China. As one of earliest Raymond mill manufacturers, GUIKUANG keeps pace with the times...

Monday, September 30, 2019

The purifying agent holds an important position in the QuEChERS pre-treatment method. An appropriate selection and application of it would be necessary for the users to improve the efficiency of purification and accuracy of the sampling detection result. Selection of purifying agents...

Monday, September 30, 2019

HPLC columns are widely used in many fields, whose column efficiency, capacity, permeability characteristics, and service life are very important. After using for a period of time, there will be changes such as column pressure increase, column efficiency decrease, etc. If no measures are taken...

Saturday, September 28, 2019

Depending on the packing of the HPLC column. The following column types are available on the market: 1. Silica gel HPLC column: Silica gel is the earliest chromatographic column packing used in liquid chromatography. It has a wide range of applications. However, it can only be used...

Friday, September 27, 2019

Reliable flash columns play a decisive role in a good chromatographic separation method, which ensures complete separation of valuable compounds and specific impurities. Choosing the right flash column is the most critical part of the purification process. There are two aspects should...

Friday, September 27, 2019

Non-Polar Interaction, the interaction between a non-polar functional group on a target compound and a non-polar sorbent, which is better reflected in a polar solvent environment, especially in a water environment. Also known as hydrophobic interactions, such as the interaction between...

Thursday, September 26, 2019

Quantity : 2000Ton - Price : 6~60 usd/KG

Are you looking for RTV silicone thermal conductivity? FEATURES OF GOLOHO-2752 GOLOHO-2741 is a high performance thermally conductive RTV silicone adhesive · Excellent thermal conductive, heat dissipation and adhesion ·Small power heater can be directly bonded on the radiator without...

Thursday, September 26, 2019

Quantity : 2000Ton - Price : 6~60 usd/KG

FEATURES OF HEAT RESISTANT RTV SILICONE GLUE GOLOHO-2402W GOLOHO-2491 is a high-performance heat resistant RTV silicone glue for electronics. ·Convenient to use: one part, rapid curing at room temperature,deal coholization ·Neutral,non-corrosive to various metals. Excellent bonding...

Thursday, September 26, 2019

- Reversed-Phase Principle - The reversed-phase filler is a kindly of nonpolar filler such as C4, C8, C18 aliphatic chain which is bonded on the silica gel. Nonpolar or hydrophobic compounds are strongly reserved, while polar samples are weakly reserved and go through the flash reversed-phase...

Wednesday, September 25, 2019

General requirements for adsorbents: large surface area and certain adsorption capacity. Does not chemically change with the developing agent, does not react with or catalyze, decompose or associate with the substance to be separated, and the particles are uniform. Silica gel and...

Wednesday, September 25, 2019

Quantity : 1-200ton - Price : 10usd

We offer different kinds of Station Post Insulator for Substation, such as Circuit Breaker (CB), Post Insulator, Disconnector, Potential Transformer (PT), Surge Arrester, etc. Contact us get more details about Station Post Insulator, such as TDS, Application Method, OEM etc. We can...

Tuesday, September 24, 2019

Screw thread top sample vials have excellent chemical stability, sealing and corrosion resistance, and are available in both transparent and amber. The cap of sample vial has a solid lid and a perforated lid, which can be divided into black and blue. This series of products are designed...

Tuesday, September 24, 2019

Suitable for a general flash chromatography method analysis, the flash column chromatography is the method of isolating a component from a mixture and purify it as well. Different from the old method: long column chromatography technology, flash column chromatography can separate...

Monday, September 23, 2019

Let's take a look at two common adsorbents for adsorption chromatography. Polyamide The polyamide adsorbent can be divided into nylon 6 (polycaprolactam) and nylon 66 (polyhexamethylene adipamide), which are hydrogen bond adsorption and semi-chemical adsorption. There are many amide...

Sunday, September 22, 2019

Quantity : 1 - Price : $60000

- Basalt powder grinder;Basalt micro powder grinder, powder milling machine: - Basalt ingredient is silica, 3 oxidation 2 aluminium, ferric oxide, calcium oxide, magnesium oxide, which silica content , about forty-five percent to 50 or so. Basalt color, more common for black, black...