Sutapa Patra

Sutapa Patra
Hebrew University of Jerusalem | HUJI · The Fredy & Nadine Herrmann Institute of Earth Sciences

About

3
Publications
1,398
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54
Citations
Citations since 2017
3 Research Items
54 Citations
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Introduction

Publications

Publications (3)
Article
Phytoliths are microscopic siliceous particles that precipitate within epidermal cells of plant leaves. Phytolith morphology and its carbon isotopic composition (δ¹³C) are often used to understand the past vegetation composition. To extract phytoliths from modern plants, two different wet-oxidation techniques, dry ashing and microwave digestion hav...
Article
Full-text available
The present study focuses on the investigation of the optical anisotropy, optical sign, textural heterogeneity and deformational features of the maceral grains along with the Raman spectral characteristics of the seven coal samples collected from the Himalayan fold-thrust belts of Sikkim State, India. The coal samples were extremely fragile and pul...

Questions

Questions (4)
Question
Hi Guys
To prepare a stock concentration of 202ng/ul of 5alpha-androstane standard how much (in g or mg) androstane is required to take where the mw of androstane is 260.46 g/mol and the volume of solvent is 10 ml? Thanks
Question
Can anyone please suggest me which is the best internal standard to quantify isorenieratene biomarkers? Thabnks in advance
Question
Hi All,
Can anyone please tell me which mathematical equation can be used to normalize the single ion monitoring quantitation in GC-MS? Thanks in advance!
Question
Initially, I added a known conc of internal standard (IS) in my saturate fraction and then integrated the area of the internal standard from the GC-MS and from this calculation I easily callculated the conc of C17 in my fraction.
For example, Conc. of C17 =[ IS conc. X C17 area]/IS Area.
Please tell me is this procedure accurate? I followed some books where it has been asked to use calibraton curve. I really don't understand what's the point of using calibration curve to find the unknown conc. of any carbon compound in my sample. Please help me out. Thanks in advance.

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