User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/09/19: Difference between revisions
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|style="background-color: #EEE"|[[Image:owwnotebook_icon.png|128px]]<span style="font-size:22px;"> Project name</span> | |style="background-color: #EEE"|[[Image:owwnotebook_icon.png|128px]]<span style="font-size:22px;"> Project name</span> | ||
|style="background-color: #F2F2F2" align="center"| | |style="background-color: #F2F2F2" align="center"|[[File:Report.png|frameless|link={{#sub:{{FULLPAGENAME}}|0|-11}}]][[{{#sub:{{FULLPAGENAME}}|0|-11}}|Main project page]]<br />{{#if:{{#lnpreventry:{{FULLPAGENAME}}}}|[[File:Resultset_previous.png|frameless|link={{#lnpreventry:{{FULLPAGENAME}}}}]][[{{#lnpreventry:{{FULLPAGENAME}}}}{{!}}Previous entry]] }}{{#if:{{#lnnextentry:{{FULLPAGENAME}}}}|[[{{#lnnextentry:{{FULLPAGENAME}}}}{{!}}Next entry]][[File:Resultset_next.png|frameless|link={{#lnnextentry:{{FULLPAGENAME}}}}]]}} | ||
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==Tasks for 19 September== | ==Tasks for 19 September== | ||
* To begin new synthesis of PVA and 10% w/w PVA-Clay films | * To begin new synthesis of PVA and 10% w/w PVA-Clay films | ||
* To finish analysing PVA-Malachite data | * To finish analysing PVA-Malachite green data | ||
* To start analysis on X-ray | * To start analysis on X-ray | ||
*To | * To complete preparation of ionic liquid modified clay | ||
* To set up experiments for the measurement of absorbance of Mercury and Arsenic by films | |||
===New film synthesis=== | ===New film synthesis=== | ||
Line 16: | Line 17: | ||
* 1.0044 g 22,000 MW PVA and 0.1104 g Na Montmorillonite were used for the synthesis of 10% w/w PVA-Clay polymer film. | * 1.0044 g 22,000 MW PVA and 0.1104 g Na Montmorillonite were used for the synthesis of 10% w/w PVA-Clay polymer film. | ||
===Completing preparation of ionic liquid modified clay=== | |||
Continued from [http://openwetware.org/wiki/User:Alicia_Rasines_Mazo/Notebook/CHEM-581_Experimental_Chemistry_I/2014/09/17 Set. 17 2014] | |||
#Ground with mortar | |||
#Stored in dissecator | |||
===Measuring the Absorbance of Mercury and Arsenic=== | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Film''' | |||
| align="center" style="background:#f0f0f0;"|'''Solution''' | |||
| align="center" style="background:#f0f0f0;"|'''Empty glass vial (g)''' | |||
| align="center" style="background:#f0f0f0;"|'''Glass Vial + film (g)''' | |||
| align="center" style="background:#f0f0f0;"|'''Film weight (g)''' | |||
|- | |||
! scope="row" | PVA || 150 ppm As | |||
| 13.0969 || 13.2069 || | |||
|- | |||
! scope="row" | || 100 ppm As | |||
| 13.1262 | |||
| 13.2127 | |||
| | |||
|- | |||
! scope="row" | || 50 ppm As | |||
| 13.1340 || 13.2340 || | |||
|- | |||
! scope="row" | || 150 ppm Hg | |||
| 13.0145 || 13.1050 || | |||
|- | |||
! scope="row" | || 100 ppm Hg | |||
| 13.0742 || 13.1521 || | |||
|- | |||
! scope="row" | || 50 ppm Hg | |||
| 13.1254 || 13.2356 || | |||
|- | |||
! scope="row" | 10% PVA-Clay|| 150 ppm As | |||
| 13.1197 || 13.2435 || | |||
|- | |||
! scope="row" | || 100 ppm As | |||
| 13.0765 || 13.1374 || | |||
|- | |||
! scope="row" | || 50 ppm As | |||
| 13.1298 || 13.2529 || | |||
|- | |||
! scope="row" | || 150 ppm Hg | |||
| 13.1706 || 13.2172 || | |||
|- | |||
! scope="row" | || 100 ppm Hg | |||
| 13.1208 || 13.1908 || | |||
|- | |||
! scope="row" | || 50 ppm Hg | |||
| 13.1493 || 13.2317 || | |||
|- | |||
|} | |||
* Note: in order to make up the specified dilutions (Table above) of As and Hg, dilutions of stock solutions were prepared. | |||
* Eleni prepared the arsenic dilutions | |||
* James and Madeleine prepared the mercury dilutions | |||
*Dilutions: | |||
**0.0499 mol As/L × 74.921 g As/mol × 1000 mg/g = 3738.56 mg/L = 3738.56 ppm | |||
*#(3738.56 ppm)(V)=(150ppm)(50mL) | |||
*#*2mL in 50mL volumetric | |||
*#(3738.56 ppm)(V)=(100ppm)(50mL) | |||
*#*1.34mL in 50mL volumetric | |||
*#(3738.56 ppm)(V)=(50ppm)(50mL) | |||
*#*0.668mL in 50mL volumetric | |||
**268 ppm Hg (13.4 mM HgCl<sub>2</sub>) | |||
*#(268 ppm)(V)=(150 ppm)(50mL) | |||
*#*27.98mL in 50mL volumetric | |||
*#(268 ppm)(V)=(100 ppm)(50mL) | |||
*#*18.66mL in 50mL volumetric | |||
*#(268 ppm)(V)=(50 ppm)(50mL) | |||
*#*9.33mL in 50mL volumetric | |||
10 mL of each solution were poured into glass vials containing the PVA-polymer films | |||
===Second Analysis of UV-Vis MG data for PVA-polymer film=== | |||
[[Image:MGPVAUVVis 190914.png]] <br.> | |||
Used MG calibration curves obtained on [http://openwetware.org/wiki/User:Alicia_Rasines_Mazo/Notebook/CHEM-581_Experimental_Chemistry_I/2014/09/05 Sept. 5 2014] | |||
*ε<sub>615nm</sub>=0.1293 M<sup>-1</sup>cm<sup>-1</sup> | |||
*A=εbc. | |||
Solving for concentration: | |||
* PVA in 2ppm = 0.031/(0.1291 M<sup>-1</sup>)= 0.240 ppm MG remain in solution (rest absorbed by film) | |||
{| {{table}} | |||
|- | |||
! PVA in | |||
! MG left in solution (ppm) | |||
! MG absorbed by film (ppm) | |||
|- | |||
| 2 ppm MG | |||
| 0.240 | |||
| 1.760 | |||
|- | |||
| 8 ppm MG | |||
| 0.913 | |||
| 7.087 | |||
|- | |||
| 80 ppm MG | |||
| 31.70 | |||
| 48.30 | |||
|- | |||
| 200 ppm MG | |||
| 92.00 | |||
| 108.0 | |||
|} | |||
Note that 10 of MG solution were added per vial, so that 2 ppm MG = (1.760 mg MG/L)×0.010L=0.0176 mg MG/film <-- absorbed amount <br.> | |||
The weight of the film submerged in 2 ppm MG solution was 0.1060 g. Refer to [http://openwetware.org/wiki/User:Alicia_Rasines_Mazo/Notebook/CHEM-581_Experimental_Chemistry_I/2014/09/12 Sept. 12 2014] for further film weights. | |||
*(0.0176mg MG/0.01060g film)='''0.0166 mg MG/g film''' | |||
*8 ppm: '''0.728 mg MG/g film''' | |||
*80 ppm: '''4.49 mg MG/g film''' | |||
*200 ppm: '''10.8 mg MG/g film''' | |||
===Measuring amount of MG absorbed onto glass vial=== | |||
[[Image:UVVIS Controls 190914.jpeg]]<br.> | |||
As in previous section, the molar absorptivity and calibration curve from Sept. 5 2014 were used. <br.> | |||
80 ppm MG in glass vial control: 42.87 ppm were absorbed by glass (Calculations as show in previous section) | |||
*'''0.429 mg MG/glass vial''' | |||
200 ppm MG in glass vial control: 88.63 ppm were absorbed by glass | |||
*'''0.886 mg MG/glass vial''' | |||
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Latest revision as of 00:19, 27 September 2017
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Tasks for 19 September
New film synthesis
Completing preparation of ionic liquid modified clayContinued from Set. 17 2014
Measuring the Absorbance of Mercury and Arsenic
10 mL of each solution were poured into glass vials containing the PVA-polymer films Second Analysis of UV-Vis MG data for PVA-polymer film<br.> Used MG calibration curves obtained on Sept. 5 2014
Solving for concentration:
Note that 10 of MG solution were added per vial, so that 2 ppm MG = (1.760 mg MG/L)×0.010L=0.0176 mg MG/film <-- absorbed amount <br.> The weight of the film submerged in 2 ppm MG solution was 0.1060 g. Refer to Sept. 12 2014 for further film weights.
Measuring amount of MG absorbed onto glass vial<br.> As in previous section, the molar absorptivity and calibration curve from Sept. 5 2014 were used. <br.> 80 ppm MG in glass vial control: 42.87 ppm were absorbed by glass (Calculations as show in previous section)
200 ppm MG in glass vial control: 88.63 ppm were absorbed by glass
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