I can't give you anything but a vague memory.  It is my memory that decades ago glass slides with a vapor deposited silver mirror coating were used to test paper packaging materials for the presence of sulfur.  Sulfur caused the silver mirror to turn black.  Sorry I don't have any more details.

Mary Davis, 
Retired Materials & Process Engineer

-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Richard Kraszewski
Sent: Monday, January 28, 2019 10:30 AM
To: [log in to unmask]
Subject: [TN] Recommendation for Sulfur Spot Tests

Anyone aware of a good spot test  to quickly check  for sulfur (sulphur) which they are willing to share??

Currently, using the iodine-azide method from the classic Organic Spot Test book by Feigl with limited success. 
Hoping some else could recommend some other. 

Rich  Kraszewski 
Senior Staff Process Engineer

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