Chang-Er Chen

10 Questions 33 Answers 0 Followers

Questions related from Chang-Er Chen

Waters TOF MRM function list and further quantification problems?

Hi guys, Recently we tried the TOF MRM function and in the table, we have 9 chemicals in 9 channels/rows (Figure 1). then we acquired the data but found that only 4 MSMS functions/channels...

27 September 2019 3,681 6 View

Missed a-Pinene on supelcowax column?

We have a Superlcowax 10 GC column (30m, 0.2mm, 0.2um) and I am using it for essential oil chemicals analysis as recommended. I have a-Pinene, beta-Pinene, camphene, careen, limonene, terpinolene...

11 October 2016 379 13 View

What are the differences between Targetlynx and Quanlynx?

Hi guys, I am bit confused again by the masslynx application managers: what are the differences between Targetlynx and Quanlynx? it seems both of them can do quantification. thanks.

27 February 2015 7,522 4 View

How can I set the scan times for MRM in masslynx?

Hi everyone, I am doing MRM on our Micromass API MS. I am wondering how should I set the scan times, like inter-channer delay, inter-scan delay and dwell time? any tips for these settings? I am...

23 February 2015 1,569 10 View

Why are there two peaks on the chromatogram for one ion?

I injected BPA and estrogens, and used a 100mm column to separate them. Detected by MS in sim mode. Then I found out, for example: for BPA, there are two peaks: normal peak as expected with small...

16 December 2014 6,799 11 View

How can I do flow injection analysis (FIA) on Masslynx?

Hi guys, I am wondering can we do FIA on the Masslynx? It is a good function, but I can not find it for masslynx? If masslynx does not have this funciton, I am wondering it is possible to install...

26 November 2014 2,511 11 View

How can I load XAD in some silico like PDMS?

I am going to make a binding phase with PDMS but loading some XAD resin in to it. Any idea how can I do this in order to make a evenly distributed film? Thanks.

03 September 2014 4,287 2 View

Can XAD16 be dissolved in hot toluene?

Hi everyone, I am going to load XAD16 resin into poly(ethylene-co-vinyl acetate-co-carbon monoxide) (PEVAC) to make a resin sheet. I need to dissolve the PEVAC beads in hot Toluene, so I am...

11 August 2014 4,812 2 View

Isotope dilution method (IDM) and internal standard method (ISM)?

I am a little bit confused by these two methods, is the IDM best? What is relationship of these two methods? Is IDM one kind of ISM? In addition to these questions, what about the surrogate...

11 July 2014 1,144 7 View

What could cause the absence of a clear peak for some Personal Care products on MS with infusion or FIA?

We are currently working on some personal care products with LC-MS (single quad). We can observe a nice peak for Bisphenol A (BPA) with direct infusion or FIA (like for 200ppb). However, when we...

26 November 2013 553 4 View