31 Table 2: Trace elements results for ultrapure water


Although for this set of elements most levels were the same, where there were differences, the auto dispensing method results were favourable. Results for other acids and peroxide are available on request and again show that the auto dispensing method produces signifi cantly lower levels.


Conclusion


The auto dispensing easyFILL system demonstrated better acid dispensing capability and a superior analytical blank value compared to the manual bottle top dispensing method by removing analyst contamination and human error. The lower levels achieved by easyFILL for both the major and trace elements can be explained by the use of metal-free lines, the use of sealed bottles so there is no risk of the reported contamination from leaving them open during normal operations, and the removal of other potential sources of contamination associated with reagent handling.


Coupled with consideration of the safety aspects of the elimination of acid handling, the easyFILL is a true asset to any laboratory performing trace element analysis.


For further information visit www.analytix.co.uk/contact/


Table 2 shows the results for levels of trace elements in ultrapure water for manual dispensing with a bottle top system compared to auto dispensing using easyFILL.


References 1. FDA, The Baby Food Safety Act of 2021


2. I. Rodushkin, E. Engström, D. C. Baxter Anal. Bioanal. Chem. 396 (2010) 365-377. Read, Share and Comment on this Article, visit: www.labmate-online.com Characterising waste plastic pyrolysis oils - a new application note


As the global production of polymers continues to rise, the demand to recycle plastic waste has increased. Alongside traditional mechanical recycling, petrochemical companies are investing in chemical recycling technologies. Methods such as methanolysis and hydrolysis can be used to recycle PET and nylon however polyolefi ns such as polyethylene and polypropylene resist this type of depolymerisation due to strong carbon-carbon bonds. For these plastics, pyrolysis as a method of chemical recycling is preferred.


Although the operation may seem simple: apply elevated temperatures in an inert atmosphere to break down plastics into smaller molecules, different polyolefi ns decompose at different temperatures that ultimately affects the nature and quality of the resulting pyrolysis oil. Additionally, unwanted plastics such as PET and PVC, can yield oxygenated and chlorinated compounds that contaminate the output so this needs to be analysed in order to adjust the pyrolysis conditions.


A new CDS application note from Analytix describes the analysis of two pyrolysis oil outputs using the CDS series 6000 pyrolyser. The oils could not be analysed using traditional GC methods where certain fractions of the oil output would be too heavy and non-volatile and would remain in the GC injection port. The method uses evolved gas analysis (EGA) coupled with multi-step-pyrolysis (MSP). The EGA provides valuable data that can be used for temperature selection in MSP that enables analysis of the complete oil.


For a free copy of the application note please contact Analytix. More information online: ilmt.co/PL/BXeb and ilmt.co/PL/m42x


62012pr@reply-direct.com


Make your own ultra-pure analytical grade acids


SOLVENT EXTRACTION


Have you ever wondered how much it costs to purchase ultra-pure acids for your laboratory? Why not make your own by purifying HF, HNO3 and HCl acids with the Milestone Clean Chemistry systems from Analytix. Low cost, low grade acid is automatically loaded into the distillation container where it is gently heated below its boiling temperature using a sub-boiling technique.


High purity acid vapours rapidly condense into a collection bottle by forced air cooling meaning that no chiller is required either.


More information online: ilmt.co/PL/nm2N nd ilmt.co/PL/34ON


62013pr@reply-direct.com TEL: 0844 800 4220 EMAIL: sales@analytix.co.uk


ENVIRONMENTAL SAMPLE SOLVENT EXTRACTION


Speed up your sample preparation using microwave enhanced extraction systems


Extraction using non-polar solvents with fast and homogeneous heating using patented shields


Suitable for US EPA method 3546 and ASTM D5765-05 with greatly reduced running and labour costs


WEBSITE: www.analytix.co.uk


Extract 24 samples simultaneously in 40 mins in EPA compliant 100ml disposable glass vials


Sample capacity up to 30g with dedicated glass vial plus PTFE cap for straight to centrifuge capability


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