Aplicações

Efficiency comparison of extraction process between lab and industrial Rotavapor

Application Note Sepiatec SFC purifying the triterpene amyrin

Application Note Sepiatec SFC purifying stevioside

Application Note Sepiatec SFC purifying lavender essential oil

Application Note Sepiatec SFC purifying cannabinoids

Application Note Sepiatec SFC separating Crocus savitus

SpeedExtractor E-916, Multivapor™: Determination of Polymer Plasticizers in Polyamide samples using the SpeedExtractor E-916

Separação de canabinoides por cromatografia flash

Separação de canabinoides por cromatografia flash

SpeedExtractor E-916, Multivapor™: Fat determination in Mayonnaise and Chocolate using the SpeedExtractor E-916

Cromapédia: o guia completo

A Cromapédia completa apresenta o conhecimento básico para desenvolver e realizar a cromatografia flash ideal e o método de cromatografia líquida de alta eficiência de preparação. Conte com uma teoria concisa e explicações claras de todas as partes do processo de cromatografia. Use os fundamentos de cromatografia para desenvolver seu próprio método com consumíveis, métodos de detecção, fases estacionárias e móveis que são ideais para a sua aplicação.

This application guide describes important aspects of the evaporation of solvents and the concentration of a sample to a predefined volume using the SyncorePlus. Guidelines for the evaporation of your specific solvent and solvent mixtures are presented. They will help you to streamline your own process with sample applications, checklists, hints, rules, tables, and tests.

Productivity Handbook for Industrial Evaporation

Obtenha nosso “Productivity Handbook for Industrial Evaporation” GRATUITO. 

Ponha em prática a experiência da BUCHI em como personalizar e aproveitar ao máximo seu Rotavapor® de acordo com suas necessidades.

Fundamentos de cromatografia

Os fundamentos da cromatografia líquida de alta eficiência de preparação e cromatografia flash mais úteis sempre na palma da sua mão! 

Baixe a enorme folha de dicas com os fundamentos necessários para realizar separações perfeitas.

FlashPure: Cobertura Completa dos Cartuchos Flash

Na BUCHI, nos esforçamos para atender às expectativas dos clientes com produtos de alta qualidade, suporte técnico local e apoio global. Para satisfazer ainda mais os clientes, a BUCHI apresenta os novos cartuchos FlashPure, caracterizados por um alto desempenho e versatilidade, e oferece-os em toda a sua rede de distribuição mundial.

Obtenha o Guia de Seleção FlashPure. Explore as características para obter os melhores resultados de purificação.

Guia de evaporação paralela ambiental

Este guia descreve os aspectos da concentração simultânea de várias amostras para um volume residual predefinido de solventes cumprindo os métodos da Agência de Proteção Ambiental dos EUA (US EPA) com o Syncore® Analyst.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of immersion angle.

The evaporation rate of a rotary evaporator depends to a large extend on the immersion angle of the evaporating flask. The flatter the immersion angle, the higher the evaporation rate. This is, among other reasons, due to the fact that a flat immersion angle increases turbulence inside the evaporating flask, hence accelerating the evaporation. However, with a flatter immersion angle the evaporating flask cannot be as deeply immersed in the heating bath medium compared with a steep immersion angle. This can be an issue especially working with smaller evaporating flasks. Generally speaking, a 40 degrees immersion angle leads to a maximum efficiency rate without restriction in handling or risking losing parts of the sample due to over spilling and bumping into the receiving flask.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of flask size.

Generally, the larger the evaporating flask the greater is the evaporation rate. This is due to the greater turbulence inside a larger flask, enlarging the active surface and leading to a higher evaporation output. On the other hand, smaller flasks are advantageous when the residue needs to be collected for further quantitative analyses. Moreover, larger flasks generally allow easier handling.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of thickness of flask.

The evaporation rate is noticeably greater if the evaporating flask’s glass walls are thinner. The simple reason is that thinner glass allows better heat transmission from the heating bath through the glass of the evaporating flask to the solvent. Generally speaking, the glass wall thickness should be selected to be as thin as possible, while still being robust enough to prevent breakages of the evaporating flask even at very low pressures. Concerning both these issues, the optimum thickness for a 1 L evaporating flask is between 1.5 and 2.0 mm.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of rotation speed.

The evaporation rate of a rotary evaporator is greater than that of static distillation apparatus. Moreover, the evaporation rate increases with higher rotation speed. This is, among other factors, due to the greater surface area inside the evaporating flask at one given time. Especially significant is the dissipation at lower rotation speeds. For instance an increase in speed above 200 rpm has a relatively low influence on the evaporation output. A rotation speed above 300 rpm can result in mechanical problems, vibrations and spillage from the heating bath. Thus, considering the advantages and disadvantages of different rotation speeds, the optimum rotation speed is around 250 to 280 rpm.

Achieve higher distillation efficiency when using a rotary evaporator by reading on the impact of temperature differences.

There is a direct relationship between the heating bath temperature and the evaporation rate. The more energy applied to the evaporation side, and at the same time removed from the condensation side, the more efficient is the distillation. Furthermore, sufficient cooling as well as an appropriate and stable under pressure are crucial for efficient distillation. On the other hand, the consumption of electrical energy is comparatively greater at higher temperatures. Moreover, some samples are thermo-sensitive, thus exacerbating the circumstances. Therefore the respective parameters have to be fine-tuned to the individual sample and application. The “Delta 20 Rule” is a guideline to compromise between high evaporation output and energy usage. For instance, using the 10/30/50 parameters is appropriate for the evaporation process in order to bring in and to carry off the accumulated energy efficiently.