Pack of 5 Fluorescence Quartz Cuvette,Screw Cap

The cuvette has a fused quartz body and windows. It fits all standard UV-VIS fluorescence spectrophotometers (such as Shimadzu, Perkin Elmer, GE, HP, and Beckman etc.). These cuvettes are designed for UV-VIS-NIR fluorescence applications.

Our cuvettes are brand new and direct from us, the manufacturer. Although we are new on eBay, we have extensive experience in scientific quartz products. Our experts welcome any questions about our quartz products and their spectroscopic or laser applications. We can also fabricate customized quartz and glass scientific apparatuses to your specifications. You just send us your design and we will send you a quotation. With our competitive pricing and finishing time, we are confident that we can underbid other vendors and even your university glass workshop!

Parameters:

Technical Q&A:

Q: Why is the transmission of your quartz cuvette only about 87% on the graph instead of near 100% since quartz should not absorb UV-VIS light?

A: When we measure the transmission curve of our quartz cuvette, the reference we use is air. The primary light loss is due to the light reflection on the interface between quartz window and air. According to Fresnel equations ^[1]:

Here, n₁=1 (index of air), n₂=1.4585 (index of quartz) and we have four air-quartz interfaces. Then the calculated loss of reflection light is about 13%, which means the transmission=100%-13%=87%, which match our measurement. Similarly, Hellma and Starna cells have identical transmission characteristics.

Ref [1]: http://en.wikipedia.org/wiki/Fresnel_equations

Payment:

We accept PayPal. We ONLY ship our items to a PayPal Confirmed Address.

”Worry Free” Shipping Method:

After receipt of your payment, your item will be shipped within 2 business days with INSURANCE. If your item was lost and damaged, we will do FULL money refund or ship a new one to you! Absolutely worry free!

1. Free international shipping to all over the world:

By Hong Kong Post Registered Air Mail. For U.S. Buyers, it usually takes 5-10 business days to arrive. (It includes a tracking number that can be traced on www.usps.com.) For other international buyers, it usually takes 5-14 business days to arrive. (It includes a tracking number that can be traced on Hong Kong post and your destination county post website.)

2. Expedited Shipping Option:

US$10.95-19.95, depends on the destination country. Your order will be shipped through UPS/FedEx/DHL/EMS which usually takes 3-5 business days to arrive. It includes a tracking number. Please leave us a contact phone number which helps your local UPS/FedEx/DHL/EMS delivery person to reach you. Without a phone number, we can not ship your order out.

3. TAX Note:

Import duties, taxes, and charges are the buyer's responsibility. While we will try our best to help you avoid delays and unnecessary taxes, we are NOT responsible for any Postal or Customs delays and charges. Please check your country's customs or Post Office websites for details. (U.S. buyers whose shipment value is less than US$200 usually do not experience delays and duty^[2]. If your order value is more than US$200, just let us know. We will discuss the customs issue with you to make sure that you get happy, fast and smooth shipping.)

Ref[2]:http://www.cbp.gov/xp/cgov/trade/basic_trade/internet_purchases.xml#PostalServiceCouriersandFreight

Returns without any questions:

We have great confidence in our products! If you are not completely satisfied for any reason, simply ship it back to us within 30 days and we will refund your full purchase price. (Please contact us first to get an RMA (Return merchandise authorization) number and Return address. Our customer service representative will instruct you the next step for your refund.)

So why wait? Buy it now!

Contact us:

If you have any questions or some specific requirements, you can always reach us by eBay email or quartzcrystal88@gmail.com. We try our best to serve you. Your satisfaction, positive feedback, and a 5-star DSR are our goal.

Thank you for your interest!