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Photometer Product Applications In Ireland
26 applications found
here are many different ways to express concentration of a ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This method allows the analyte to be pre-concentrated in the final solution, decreases the volume of strong acid used in the dissolution stage and does not use organic ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
The calcium content of aqueous solutions of deoxyribonucleic acid (DNA) and deoxyribonucleoprotein (DNP) cannot assayed directly because of interference effects. An acid extraction procedure enabled direct measurements of calcium in DNA and DNP, or a standard addition technique was used at higher ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This method has been adapted to enable measurement of lithium over a wide range of concentrations (0.10 to >8.0%), in lithium containing ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
Sodium chloride is an essential ingredient of all processed foods; it is needed to enhance flavour and increase shelf life. In many processed foods, additional sodium is added as a flavour enhancer; potassium and calcium are also naturally present but not normally used as processing ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This procedure uses a TCA (trichloroacetic acid) extraction of the tissue to release all of the ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
Cheese was wet ashed with a combination of acid and a high temperature oven to form a dissolvable product ready for analysis via flame ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
Several different techniques can be used for sample digestion and extraction of sodium and/or potassium: oven ashing, perchloric acid ashing, extraction by boiling and acidification with HNO3 as well as extraction by homogenisation in 2% trichloroacetic acid (TCA). ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This method for the measurement of sodium and potassium in silicate rocks uses a borate fusion ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This method allows the direct measurement of low levels of sodium without prior extraction procedures, which minimises possible sources of contamination. ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
These methods are adapted from methods for the determination of sodium and potassium in fatty-acid methyl ester samples. The sample is diluted with an organic solvent (xylene, cyclohexane or petroleum ether) plus a stabiliser. The calibration standards which have a similar matrix to the prepared sample solutions, are prepared from sodium and potassium organometallic salts which are dissolved in a solution of xylene with a stabiliser. These European Standards specify a method for the determination of potassium of ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
The most important ions which naturally occur in plant tissues are sodium, potassium, calcium, magnesium, nitrate, sulphate and phosphate. A sample of 5 g of oven-dried plant material contains on average, 25 mg calcium, 9 mg magnesium, 80 mg potassium and 3 mg sodium. The recommended method for the measurement of calcium is to precipitate the calcium as an oxalate, the precipitate is then dissolved and measurement taken from the resulting solution. Sodium and potassium may be measured directly following an ashing ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This method uses a suspension of ground plant material to directly measure the potassium concentration. It eliminates the usual steps of ashing and subsequent dissolution of the resulting ash. The method was compared to alternative methods such as chemical analysis and spectrophotometric methods. Collaborative studies using a range of samples gave a mean of 1.74% potassium by this extraction technique as compared to 1.75% by alternative methods. The standard deviation of an analysis in the two different sample ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
Bread contributes about one-sixth of daily salt intake and is used to improve flavour and texture. The amount of sodium in bread can differ significantly, depending upon brand and type of grain used, ranging from 592mg/100g to 748mg/100g. The level of sodium in bread is primarily due to the amount of salt added to the dough during manufacture. The amount of potassium is determined by the type of flour and the washing and bleaching operations during cereal processing. Bread does not make a significant contribution ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
This method reduces or removes potential interference from sodium, potassium and phosphates normally present in serum and urine by diluting the samples with a diluent containing ethylenediaminetetraacetic acid ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
The use of lithium carbonate for the treatment of bipolar disorders and depression is well established. However, for the treatment to be effective, it must be managed closely, to ensure the dose is maintained within the normal therapeutic range. ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
Wine is of particular interest nutritionally because it is typically low in sodium and relatively high in potassium. Sodium is the predominant cation in breakfast cereals, at levels reaching 8mg/g. Potassium and calcium also vary, particularly in wheat-based products and those enriched with milk products or calcium ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
Commercial cereals vary considerably in composition, both in their formulation and the ingredients added to enrich these products. Sodium is the predominant cation in breakfast cereals, at levels reaching 8mg/g. Potassium and calcium also vary, particularly in wheat-based products and those enriched with milk products or calcium salts. ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
The sample of biodiesel is weighed into a crucible and placed in a heating muffle furnace. Two temperatures are used in the heating program for the dry decomposition: the first temperature (250ºC) is maintained for 1 hour to dry the sample. After this the temperature is progressively elevated to 600ºC and maintained for 4 hours to eliminate the remaining organic material. ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM
A number of methods have been reported for the measurement of calcium in biological materials by flame photometry or titration. This method employs trichloroacetic acid (TCA) to precipitate the proteins and has been found to be adequate to extract all of the calcium from tissue samples. Sodium, potassium and phosphate caused no significant interference and calcium concentration in the range of 0 to 2 µg/ml is readily determined. ...
ByBWB Technologies Ltd. based in Newbury, UNITED KINGDOM