<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body dir="auto"><div dir="auto">Atlantic is the analytic company I refer clients to and Atlantic has been the independent lab certifying Air Products gas product purity for many years. I believe other other gas suppliers use them as well.</div><div dir="auto"><br></div><div dir="auto">John Boyle</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div id="composer_signature" dir="auto"><div style="font-size:12px;color:#575757" dir="auto">Sent from my Verizon, Samsung Galaxy smartphone</div></div><div dir="auto"><br></div><div><br></div><div align="left" dir="auto" style="font-size:100%;color:#000000"><div>-------- Original message --------</div><div>From: David Wolff <dwolff@nelhydrogen.com> </div><div>Date: 12/23/22 8:09 AM (GMT-05:00) </div><div>To: "Denis, Kevin L. (GSFC-5530)" <kevin.l.denis@nasa.gov>, labnetwork@mtl.mit.edu </div><div>Subject: Re: [labnetwork] CDA cleanliness verification </div><div><br></div></div>
<div class="WordSection1">
<p class="MsoNormal">We routinely use <a href="https://protononsite.lightning.force.com/lightning/r/Account/00170000011MQZ6AAO/view">
<span style="background:white;text-decoration:none">Atlantic Analytical Laboratory - Whitehouse NJ</span></a> (<a href="https://www.atlanticanalytical.com/"><span style="background:white;text-decoration:none">www.atlanticanalytical.com</span></a>) for hydrogen
analyses. Suggest you contact them.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><strong><span style="font-family:"Calibri",sans-serif;color:#242432">Dave Wolff</span></strong><span style="color:#242432"><br>
Region Sales Manager<br>
</span><span style="font-size:5.0pt;color:#242432"> </span><span style="color:#242432"><br>
<img src="cid:com_samsung_android_email_attachmentprovider_1_7665_RAW_1671808985546" id="Picture_x0020_1" style="width:1.0486in;height:.4444in" height="43" width="101" border="0" onmouseover="imageMousePointerUpdate(true)" onmouseout="imageMousePointerUpdate(false)" name="com_samsung_android_email_attachmentprovider_1_7665_RAW_1671808985546"><br>
</span><span style="font-size:5.0pt;color:#242432"> </span><span style="color:#242432"><br>
Nel Hydrogen<br>
10 Technology Drive, Wallingford, CT 06492 USA<br>
Office: <strong><span style="font-family:"Calibri",sans-serif">M</span></strong> +1 860-604-3282<br>
Fax: +1 203-949-8016<br>
dwolff@nelhydrogen.com<br>
www.nelhydrogen.com</span><br>
<br>
</p>
<p class="MsoNormal"> </p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> <b>
On Behalf Of </b>Denis, Kevin L. (GSFC-5530)<br>
<b>Sent:</b> Thursday, December 22, 2022 07:56<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] CDA cleanliness verification</p>
</div>
</div>
<p class="MsoNormal"> </p>
<table style="width:100.0%" width="100%" align="left" cellpadding="0" cellspacing="0" border="0" class="MsoNormalTable">
<tbody>
<tr>
<td style="background:#910A19;padding:5.25pt 1.5pt 5.25pt 1.5pt"></td>
<td style="width:100.0%;background:#FDF2F4;padding:5.25pt 3.75pt 5.25pt 11.25pt" width="100%">
<div>
<p style="mso-element:frame;mso-element-frame-hspace:2.25pt;mso-element-wrap:around;mso-element-anchor-vertical:paragraph;mso-element-anchor-horizontal:column;mso-height-rule:exactly" class="MsoNormal">
<b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#212121">CAUTION:</span></b><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#212121"> Our automatic validation of the sender of this mail failed. Pay extra attention to attachments
as well as links!!</span></p>
</div>
</td>
</tr>
</tbody>
</table>
<div>
<p class="MsoNormal">Hello All,</p>
<p class="MsoNormal">Following up on the great advice provided on use of copper piping for CDA. I am curious if anyone can provide a reference for a testing laboratory for measurement of CDA purity. In particular we are looking to verify low levels of organics
(10ug/m3) and inorganics NH4+ and SOx (5ug/m3). </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">We would prefer a vendor in the mid-atlantic region but any references you would provide would be very helpful.
</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Thanks, and hope everyone has a nice holiday.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Kevin</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
</div>
</div>
</body></html>