- by /u/Available_Floor8686Hi everyone, Weāve been dealing with an ignition issue on our SPECTRO ARCOS ICP-OES for over a year now, and we're hoping someone here might have insight or experience with a similar problem. The instrument fails to ignite consistently. After comparing the log files between when it was working and now, we noticed two key differences: HVPSCurrent (High Voltage Power Supply Current, in mA): When working: Ramps up to around 300 mA Now: Stays near 0 mA GenImp (Generator Impulse? ā not sure of the exact unit): When working: Around 3000 throughout Now: Starts at 0, then spikes to around […]
- by /u/equeriquiacoliHello guys! I was wondering if you guys could help with this topic. I work at a Pharmaceutical company and on of the methods we perform is retorne quantification by GC-FID. We do the quantification using a calibration curve with and Internal standard. As we have a lot of compounds and the calibrationhas several points we inject the curve once and use the data throughout a month. Always veryfing with be standard that the response factor stays the same. Is this a good approach? What do you suggest? I hope I explained everything correctly. Thanks submitted by /u/equeriquiacoli [link] [comments]
- by /u/ReceptionSad8303Hi, im a student and i need help with an assignment i have. My profesor gave me a coin and I need to determine its composition via volumetric, gravimetric or spectrometric analytical methods (that can be replicable in a lab). I would really appreciate if you could give me some info or maybe books that i can use for this assignment. My coin is a 1981 100 pesos coin from argentina, based on information online it is composed of brass coated steel, but its pretty old. (https://es.numista.com/catalogue/pieces8117.html) Here is the full assignment (https://docs.google.com/document/d/1D3fJlVgNzO0ST2\_He3UD08EBOwyU-Ikhoh1OX\_yqokg/edit?tab=t.0) submitted by /u/ReceptionSad8303 [link] [comments]
- by /u/Aware_Job_6879I'm developing an LC-MS/MS method using my own urine as the matrix. To ensure consistency, what are the best practices for hydration, collection timing (e.g., first-morning vs. spot), and pooling samples? Should I characterize the pool (e.g., creatinine, pH)? Any key tips, pitfalls to avoid, or texts to read would be appreciated. Thank in advance! submitted by /u/Aware_Job_6879 [link] [comments]
- by /u/raichgreensubmitted by /u/raichgreen [link] [comments]
- by /u/Alarming_Advisor_118Looking for Trientine NDSRI LCMS Method can somebody help? submitted by /u/Alarming_Advisor_118 [link] [comments]
- by /u/Apacukafundaluka12In analytical chemistry, I often see research topics described as ādevelopment of new procedures.ā What does this typically mean in practice? Is it about designing completely new analytical methods, or is it more about optimizing and modifying existing ones (e.g., greener solvents, miniaturized extraction, new sample preparation workflows)? Iād love to hear examples from people who have worked on such projects. submitted by /u/Apacukafundaluka12 [link] [comments]
- by /u/Afsh31Kindly name the instrumental analytical techniques that are used for qualitative purposes mostly ? I can think of FTIR thatās mostly used for qualitative purpose .. please tell what are other instruments/techniques used majorly for qualitative testing. Tysm Edit: If you're not sure about the answer, it's best to refrain from responding or simply ignore this post. The answer isn't readily available on ChatGPT because this is more of a practical, lab-based question rather than a purely theoretical one. I have given you the example of FTIR. While FTIR can theoretically be used for both qualitative and quantitative analysis, in […]
- by /u/Rapid-diamondI am in the process of calculating uncertainty involved in the determination of Cu by AAS. I need the following uncertainty parameters, spectrometer stability, baseline stability, repeatability, which is supposed to be available from the instrument manufacturer. From a technical specification document, I found that ''Performance: >0.95Abs with precession of submitted by
- by /u/PFAS123I have a PhD in analytical chemistry and have been working in the pharmaceutical company. I am looking for a remote job. I have 2+ years of experience. I have used Mass Spec from every vendor possible for targeted and untargeted small molecules and proteomics. Any help or suggestions will be helpful. submitted by /u/PFAS123 [link] [comments]
- by /u/Difficult_Emu6150Iām starting my junior year (but technically Iāll be starting my sophomore year)this fall and wanted to know about industry and research internships. Iām currently working in an analytical lab and have work experience with glow discharge (the entire setup with the Rf generator, oscilloscope, cmos cameras), Micro-droplet printers etc. I have also worked extensively on motorized stage especially the coding aspect of it to automate the printing of the droplets. I also have some background with andor and matlab. I want maybe an internship or atleast something to look forward to. Do Pharma companies even hire intern? (Iām down […]
- by /u/WahWashSo full disclaimer – I'm not a chemist. My wife and I own a tiny fragrance company. We won a 6890/5973N at auction for 3000 bucks from Virginia Dept. Of Forensic Science and with a lot of blood, sweat, and service manuals have had it up and running beautifully in our basement "lab" for the past year. Total cost, including foreline pump, gas, consumables, column, was about $6k. That even includes the Hi-vac board on the MS that violently failed about 6 months in. Everything comes from EBay and Restek because Agilent won't even do business with us. Needless to […]
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