Solvent Effect

Concept In general, we regard “solvent effect” as the phenomenon of chromatographic peak deformation when the strength of the sample solvent is greater than that of the mobile phase. Sometimes the strength of our sample solvent is not greater than that of the mobile phase due to the addition of Read more…

A More Efficient Chromatography Mode-MMC

MMC Overview Mixed-mode chromatography(MMC) optimized the structure of the functional ligand, combining two or more interaction modes to enhance affinity and selectivity to the target protein, thus improving purification efficiency. Compared with the traditional IEC and HIC, the new mode MMC has advantages of high loading capacity, high selectivity and high efficiency. Read more…

New Product Release: Come Out of the Dilemma of Separation and Purification

In the process of separating and purifying compounds, preparative columns that have high efficiency, stability and low pressure play a crucial role in developing a reliable separation and purification technique. Welch Materials, as a competitive manufacturer in this industry, released WelFlash SiO2 LS column to help your separation and purification work. WelFlash SiO2 LS Special personality The new generation of Read more…

Determination of 15 Kinds of Aldehydes in the Soil and Sediments

Application Range This method is suitable for the determination of 15 kinds of aldehydes in the soil and sediments (Take the the soil as substrate ) Reference standard: HJ 997-2018 Determination of soil, sediments, aldehydes and ketone compounds— HPLC Extraction and Derivation Steps Remove impurities in the sample(stones, leaves, etc.). Accurately weigh 10.0 soil sample (accurate to 0.01g) Read more…

Bonded Caps and Septa

Characteristics ● Caps and septa are boned together using a mechanical way without any adhesives or chemicals. ● No glue contamination. ● Prevent liner fallout. ● Available in 1-3mm septa thickness. ● Suitable for medical devices, diagnostic packaging and specialty chemicals. Chromatogram With methanol soaked for 1 hour in septa Read more…

Determination of Quinolones Residues in Milk

Application range This method specifies the determination of quinolones residues in milk by HPLC. This standard applies to the determination of residues of dafloxacin, enfloxacin and cyprofloxacin in milk. (This test sample is milk). Reference standard: GB 29692-2013 Determination of quinolones in Milk HPLC Extraction steps Accurately weigh 1.0g milk sample in 15mL centrifuge tube, then Read more…

Q&A for Endotoxin Rem Tanrose 4FF

Endotoxin is a common protein pollutant whose existence makes the protein activity research become very complex. Besides, it is harmful to human health for it may cause fever, microcirculation disorders, endotoxin shock and disseminated endovascular coagulation and a series of adverse symptoms. Therefore, the detection and removal of endotoxins in Read more…