Environmental Monitoring

FRITSCH Milling and Sizing

Using adapter and counterweight of the Planetary Mill PULVERISETTE 5 premium line 
See how to comminute of a rock sample smaller than 5 mm with an adapter for small grinding bowls and as a counter weight an empty grinding bowl 500 ml for the Planetary Mill PULVERISETTE 5 premium line. 
Our Planetary Mill PULVERISETTE 5 premium line with 2 grinding stations is perfect for fast wet and dry grinding of hard, medium/hard, soft, brittle and moist samples as well as for mechanical alloying, mixing and homogenising of larger sample quantities with reliable results down into the nano range and an absolutely secure automatic clamping of the grinding bowls. 
[url][link] https://www.fritsch-international.com/sample-preparation/milling/planetary-mills/details/product/pulverisette-5-premium-line/ [/link][name] Planetary Mill PULVERISETTE 5 premium line [/name][/url]

Using adapter and counterweight of the Planetary Mill PULVERISETTE 5 [i]premium line[/i]

Creating a representative laboratory sample 
See how you can effectively combine the the FRITSCH Rotary Cone Sample Divider LABORETTE 27 with the FRITSCH Vibratory Feeder Laborette 24 to create a representative sample. A perfect sample preparation is the indispensable foundation for every analysis, because any errors will be reflected in the results later on. Therefore, the reliable creation of guaranteed representative subsamples plays an absolutely central role. The FRITSCH Rotary Cone Sample Divider LABORETTE 27 offers the ideal conditions , it is the only sample divider on the market dividing your samples with up to 3,000 dividing steps per minute centred over a rotating dividing cone into up to 30 separate channels. Each individual sample with identical chemical and physical properties and with 99.9 % accuracy for many more sample materials than any other similar method. Both models of the FRITSCH Vibratory Feeders LABORETTE 24 are ideal for automatic, uniform feeding of free-flowing materials into sample dividers, mills, mixers, sieve shakers, balances and other laboratory instruments. The vibration, which is controlled by a microprocessor, conveys the sample material out of the funnel over the V or U-shaped stainless-steel channel into the respective equipment. The flow rate can be individually adjusted; the vibration amplitude is precisely controlled, for absolute uniform feed of even smallest quantities. [url][link] https://www.fritsch-international.com/sample-preparation/dividingfeeding/ [/link][name] FRITSCH Laboratory Sample Division and Laboratory Sample Feeding [/name][/url]

Creating a representative laboratory sample

Analytical Cannabis 

With the passing of the 2018 Farm Bill legalizing hemp and different US states legalizing Cannabis products, farmers are allowed to grow cannabis and hemp. Like any other agricultural crop, pesticides are applied to cannabis and hemp plants to protect it from pests and improve growth yield. Chronic exposure to pesticides can lead to serious health risks and therefore pesticide analysis in Cannabis and hemp is important for consumer safety and quality control. Among all of states in USA, California has issued most stringent action limits for 66 pesticides residues in cannabis flower, cannabis infused edibles, concentrates and hemp.  Normally pesticide analysis in cannabis and other food matrices is done by both GCMSMS and LCMSMS since some nonpolar and chlorinated pesticides such as pentachloronitrobenzene, chlordane and others are difficult to ionize with electrospray source used in LCMSMS systems.   We would demonstrate how we measured these compounds at low levels using LCMSMS with APCI source. The ionization mechanism of chlorinated pesticides such as pentachloronitrobenzene and others using LCMSMS system with APCI source would be presented. We analyzed all of 66 pesticides (including very hydrophobic and chlorinated pesticides typically analyzed by GCMSMS) spiked in  hemp and cannabis samples  well below the action limits specified by California State. Hemp and cannabis matrix is challenging and therefore it causes ion suppression and matrix inference for response of some of pesticides. We would demonstrate approaches to mitigate these matrix effects from cannabis and hemp. Sample preparation is the main bottleneck for achieving the high throughput analysis of pesticides in cannabis/hemp testing labs. For sample preparation, we used solvent extraction since it is a quick, cheap and easy way to achieve high extraction recovery in comparison to other time-consuming sample preparation techniques like solid phase extraction (SPE) and QuEChERS. Also, the performance of LC-MS/MS method was checked by conducting blind emerald scientific’s proficiency test for 66 pesticides in hemp. The proficiency test report generated with LCMSMS method showed acceptable results for all of 66 pesticides in hemp with no false positives and negatives.

Overcoming Challenges associated with analysis of all of pesticides regulated by California

Chromatography & Mass Spectrometry Solutions

Dr. Lee Ferguson of Duke University discusses PFAS testing in environmental waters using the Thermo Scientific™ Orbitrap Exploris™ 240 mass spectrometer and Thermo Scientific™ AcquireX™  intelligent data acquisition workflow.

PFAS Testing in Environmental Waters Using the Orbitrap Exploris 240 MS

Agilent - ICP-OES

How to correct for complicated background signals - automatically

Background correction made easy

Got a sample from a new source? Not sure if there are any elements in it that might cause interferences? Try this.

Discover unknown elements in your samples before they cause trouble

How to get QC on every ICP-OES sample – without making up any extra solutions

How to get QC on every sample

Not sure when you should be changing your pump tubing or cleaning your torch? Here’s how to get ICP-OES maintenance right

Hey, change your tubing!

Did you put the acid in before you digested your samples? Did you put the right acid in?

Environmental Monitoring

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