Human IL-6 ELISA Kit High Sensitivity (ab46042)

1. The Biotinylated Antibody is provided in liquid form, it is stable at 4°C
2. Standards and Controls are provided lyophilized and should be reconstituted either by the volume stated on the vial or in the Protocol Booklet. They should be used directly once reconstituted and can't be stored.


3. The Standard and Control are both made with recombinant IL-6, only the concentration differs.

Thank you for confirming these details and for your cooperation. The details provided enable us to closely monitor the quality of our products.

I am sorry this product did not perform as stated on the datasheet and for the inconvenience this has caused. As requested, I have issued a free of charge replacement with the order number 1202121.

To check the status of the order please contact our Customer Service team and reference this number.

Please note that our source for this kit is kindly providing this replacement, and so we are waiting for this to come to us before we can send it to you. I do not anticipate this will take too long. They are providing a different lot.

The free of charge replacement kit will also covered by our Abpromise guarantee. Should you still be experiencing difficulties, or if you have any further questions, please do not hesitate to let me know.

I wish you the best of luck with your research.

Thank you for your message and for providing this further information.

I have reviewed this enquiry and discussed it with the originator of this kit. Regrettably, it does seem the second kit is not providing the sensitive results you require. I appreciate the time you have spent on these experiments and would be pleased to arrange a free of charge replacement or credit note in compensation for the second kit which did not work so well.

I look forward to hearing from you with details of how you would like to proceed.

Thank you for taking the time to contact us. Your message has been forwarded to the scientific support team. I am sorry to hear you have had difficulty obtaining satisfactory results from the second kit you received.

The details you have kindly provided will enable us to investigate this case for you and this is also helpful in our records for monitoring of quality.

I would like to reassure you that ab46042 is tested and covered by our 6 month guarantee for ELISA on human samples. In the event that a product is not functioning in the applications cited on the product data sheet, we will be pleased to provide a credit note or free of charge replacement.

Reviewing this case, In order to help me investigate, I would appreciate if you can confirm some further details:

1. Please provide the order number and date of purchase

2. What type of samples have been tested, from which species?

3. What were the kit storage conditions?

4. Please describe the problem in further detail. I would appreciate if you are able to provide some data, particularly the standard curves from each kit, which will help me to assess the results.

Thank you for your cooperation. Please do not hesitate to contact me again with the further requested details and I hope we can resolve this case for you as soon as possible.

Thank you for your inquiry.
Do you have the catalogue numbers of the kits you're inquiring about? We have 7 different IL6 Human ELISA kits in the catalogue: ab46044, ab46042, ab46027, ab46041, ab100572, ab100573 and ab108867.
The IL6 High Sensitivity kits (ab46044 and ab46042) are the same, just one is 1 x 96 tests and one is 2 x 96 tests. These are high sensitivity at < 0.8 pg/ml and is in sandwich format and works with cell culture supernatant, Serum, and Plasma.
The ab46027 works with Cell culture supernatant, Serum, and Plasma as well in a sandwich format, but the sensitivity is < 2 pg/ml, but greater recovery.
The ab100572 has a broader range 1.37 pg/ml - 1000 pg/ml but < 3 pg/ml sensitivity. This works in Cell culture supernatant, Serum, and Plasma as well.
The ab100573 is the same as ab100572, except that ab100573 is recommended for cell culture extracts and tissue extracts.
The ab1008867 works with works with Cell culture supernatant, Serum, and Plasma as well in a sandwich format but is the least sensitive (8 pg/ml).
If you purchase multiple kits, you will only pay 1 shipping charge. If an item on your order is out of stock, your order will be on hold until it is ready to ship. However, you can choose to "split" your order to receive the in-stock item the next day, and the out of stock item when it comes in, but you would have to pay for both shipping charges in that case.
I hope this information helps. Please contact us with any other questions.

Thank you for contacting us.

The lab let me know the following:
Saliva is suitable for thisELISA kit, and the regular protocol would apply. There is no need to pre-treat the samples before assaying.

I hope this information is helpful to you. Please do not hesitate to contact us if you need any more advice or information.

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Thank you for confirming those details.

I have noticed that the results that you provided me with, there is a difference between the positive and negative samples by eye. How has your spectrophotometer been set up to measure this? At what wavelength have you been reading?

How long did you leave the colour to develop with the TMB substrate?

Also, I am not sure of the dilutions you describe. What was the control IL-6HS and standard IL-6HS?

You were provided with a vial of control, was this reconstituted in 1 mL of human serum diluent, then diluted further?

I am sorry for all the questions but I am trying to isolate which step may be contributing to these problems. I am also waiting on some further feedback from the lab and hopefully they will have some further suggestions to make.

I am sorry for the delay and the inconvenience this may be causing you.

Thank you for your information.

I am sorry for the delay in getting back to you. I think it would be very helpful for us to understand exactly how the standard samples and streptavidin HRP was prepared.

As you say, this kit has been extensively optimised to allow the customer to simply use it without performing extra optimisation. We have had no other reports of the kit not working as expected and its quite a popular kit. I would therefore really like to understand in detail how the solutions were made up in order to try and help you as best I can.

Can you therefore state, in uL, how each solution used was made up and diluted?

I really appreciate your help and hope that I can advise you as to how to get the best results out of this kit.