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Your Evaporation Guide – Rotation speed

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.

Your Evaporation Guide – Thickness of evaporating flask

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.

比色滴定による水および廃水中のTKNの測定

比色センサーを用いた、水および廃水中の総ケルダール窒素のISO 5663および40 CFR part 136.3に準拠した比色測定、ならびに検出限界LODと定量下限LOQの決定

Solid Supported Evaporation

Unlock extraction efficiency with a Rotavapor

TKN determination in water using 500 mL sample tubes

TKN determination in water and wastewater

SpeedDigester K-439, Kjel Line and MultiDist: Steam distillation and Potentiometric determination of Total Kjeldahl Nitrogen (TKN) according to the Kjeldahl method in water and wastewater along with determination of Limit of Detection (LOD) and Limit of Quantification (LOQ).

TKN determination in water and waste water using potentiometric titration

Determination of TKN (Total Kjeldahl Nitrogen) in water and waste water according to the Kjeldahl method using potentiometric titration

水および廃水中のTKNの測定

ケルダール法による水および廃水中のTKN（総ケルダール窒素）の比色測定

Total Kjeldahl Nitrogen determination in wastewater

SpeedDigester K-439, MultiKjel and MultiDist: Steam distillation and colorimetric titration for Total Kjeldahl Nitrogen determination in wastewater samples 

Vacuum distillation under inert conditions

Performing a vacuum distillation in a Rotavapor R-300 under inert conditions.

Solvent Extractables from Rubber (E-916)

SpeedExtractor E-916, Multivapor™: Determination of Solvent Extractables from Rubber using SpeedExtractor E-916

Ammonium, nitrate, and total nitrogen determination in fly ash

Fly-ash is a by-product of the combustion of pulverized coal and is composed of small particles. Nowadays, air pollution control standards require a separation of flue gas before being released to the atmosphere.The composition of the fly ash may vary considerabley, however, all fly ashed contain substantial amounts of silicon dioxide (SiO2) aluminium oxide (Al2O3) and calcium oxide (CaO). The fly ash in this study was provided from a pulp mill containing organic and inorganic (ammonium nitrate and ammonium sulfate) nitrogen compounds.

Dioxin determination in ambient air

UniversalExtractor E-800, Syncore Analyst: Dioxin determination in ambient air using Soxhlet extraction

Determination of Polycyclic Aromatic Hydrocarbons in water using SyncorePlus with Solid Phase Extraction (SPE) cover

SyncorePlus Analyst:  Determination of Polycyclic Aromatic Hydrocarbons in water using SyncorePlus with Solid Phase Extraction (SPE) cover

Determination of trace metals by aqua regia digestion

Comparison of different Kjeldahl Tablets for the Determination of Nitrogen and Protein in Meat Products

Comparison of different Kjeldahl Tablets for the Determination of Nitrogen and Protein in Meat Products according to the Kjeldahl Method

牛乳中の窒素およびタンパク質測定におけるさなざまなケルダール分解促進剤の比較

ケルダール法による牛乳中の窒素およびタンパク質測定におけるさなざまなケルダール分解促進剤の比較

Concentration and solvent recovery of environmental samples in dichloromethane

Syncore® Analyst R-12 with Flushback Module, Vacuum Pump V-300, Interface I-300 Pro, Recirculating Chiller F-308, refrigerated receiving vessel: precise concentration to predefined volume

Three digestion methods for protein determination in tofu

Comparison of the standard Kjeldahl digestion, hydrogen peroxide accelerated digestion and accelerated digestion using hydrogen peroxide and Kjeldahl Tablets for tofu samples.