Difference in TOC values for Water in Milli-Q system and TOC analyzer..?

22 April 2020 0 6K Report

Hi,

We are using Sievers M9 TOC analyzer for TOC measurements. We injected freshly collected water from Milli-Q purification system and observed TOC value is 105 ppb. Whereas the TOC value is 1 ppb while collecting the water. Here, water collected into a new vial and injected immidiatly.

Why huge difference in TOC results between these two data..?

Badges
Science topic

Similar topics
Chemistry
Carbon

More Bhargava Jana's questions See All

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,048 2 View

I encountered a situation where the 16s PCR amplification worked perfectly with the DNA from the same sample, but using the same sample Don't working?

I isolated microbial DNA from marine water samples taken at various sites using the Qiagen Power Water DNA Isolation Kit, including a modified enzymatic lysis step. I encountered a situation where...

24 July 2024 9,688 0 View

What is your view point regarding the edible coating on the green leafy vegetables?

1. Nutritional contribution of the edible coating 2. Self life of the vegetable to be coated with the edible coating. 3. Toxicity development after preserving the vegetable with the edible coating.

11 June 2024 1,740 3 View

During ws2 growth via cvd I have noticed black round spots on the si(100) substrate. please suggest me reason behind this?

I am using 20 mg of WO3, 800 mg of Sulphur, 925 oc growth temp, 280 oc S temp, and a 20 sccm gas flow rate.

05 May 2024 8,665 2 View

Can I allow cell phones in SPF animal house?

I have questions regarding the safe use of cell phones in animal research facilities. While I acknowledge the hygienic risk, we often spend a lot of time inside our barrier SPF facility and we...

14 April 2024 3,486 0 View

How do i calculate sample size for a survey questionnaire of my research?

I am working on tobacco intervention and developing communication strategy, for that a questionnaire was developed, population is Indian tobacco users.

13 April 2024 9,324 2 View

Inquiry Regarding Research on Female Sex Tourism in Jamaica?

Ladies and Gentleman, My name is Jana Maric, and I am a tourism management student at the university of applied sciences in Germany currently researching for my bachelor´s thesis in the field of...

08 April 2024 4,449 0 View

Can you find this relation ((β²+α²)/2αβ)sinh βb sin αa + cosh βb cos αa = cos k(a+b) from given determinant?

Please do it by hand, if not possible just do by some analytic engine.

26 March 2024 2,028 0 View

Why did I get the cracks on thin film after annealing? And how can I overcome this problem?

I deposited Ga2O3 thin film on fused quartz substrate at 500oc in Ar ambient by RF sputtering and then annealed at 900oc (very slow heating and very slow cooling i.e 1oc/min) in air ambient for 1...

11 February 2024 3,417 4 View

How to incorporate the negative slope (necking) part of an experimental tensile test data in ANSYS?

ANSYS multilinear material model does not support plastic strain vs stress data with a negative slope. Moreover, it assumes perfectly plastic (horizontal) behaviour from the end data point. How...

01 February 2024 9,950 0 View

How to learn more about SPSS and its Application?

I would like to learn more about SPSS and Its application especially in regards to data analysis. Please suggest me how I can learn more about it. Thank you so much.

11 August 2024 9,101 4 View

Can I base on reverse DNA sequences to perform alignment, convert to amino acids and GenBank submission?

I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?

11 August 2024 5,138 1 View

Baseline drift in HPLC? What causes this?

Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!

11 August 2024 3,770 4 View

Text-Communication from the M1 Hand Area using BCI—and then there is Elon Musk?

Willett, Shenoy et al. (2021) have developed a brain computer interface (BCI) that used neural signal collected from the hand area of the motor cortex (area M1) of a paralyzed patient. The...

10 August 2024 7,180 0 View

Has anyone applied Python in the field of textile engineering for data analysis, automation, or smart textiles?

I'm currently exploring the application of Python in textile engineering, specifically in areas like data analysis, process automation, and the development of smart textiles. I'm interested in...

10 August 2024 7,429 2 View

How can I use the cif data obtained from rietveld refinement extracted via gsas2, for microstructural analysis using ETEX software?

09 August 2024 7,718 0 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

How to prepare the nanoparticle treated fungal sample for Environmental SEM analysis?

A fungal strain was treated with nanoparticles. We want to do an environmental SEM analysis. So could anyone share your views on preparing the sample? Thank you.

07 August 2024 5,307 1 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

Why does my protein refolded to beta sheet during thermal denaturation analysis?

Hi! So i attempted to understand a novel protein behavior towards heat application by analyzing its secondary structure change. I subjected the protein to a thermal denaturation analysis using...

06 August 2024 1,989 3 View