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Which is better: iodine number or bromine number?
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Junning Yu
Which is better: iodine number or bromine number?
Bromine number (and Bromine Index) are based on theoretically good chemistry; however, that is where their virtues end. If these tests are run according to the current ASTM procedures, you are virtually guaranteed to get an incomplete reaction and low (perhaps as much as 50%) results. When properly applied, off the shelf equipment can result in exceptionally good accuracy and precision, but it does require a deviation from ASTM-accepted technology.
Bromine number (and Bromine Index) are based on theoretically good chemistry; however, that is where their virtues end. If these tests are run according to the current ASTM procedures, you are virtually guaranteed to get an incomplete reaction and low (perhaps as much as 50%) results. When properly applied, off the shelf equipment can result in exceptionally good accuracy and precision, but it does require a deviation from ASTM-accepted technology.
Which is better for measuring unsaturation, Iodine number or Bromine number? The answer depends on how you define "better". However I can tell you which is commercially useful. If we're dealing with fatty acids or vegetable oils, the industry standard test is Iodine number. For petroleum products, the standard test is Bromine number (or bromine index, slightly different). For the two tests, Reference Bailey's Industrial Oil and Fat Products, sixth ed. vol. 1 pg. 172, and ASTM D-1159.
Which is better for measuring unsaturation, Iodine number or Bromine number? The answer depends on how you define "better". However I can tell you which is commercially useful. If we're dealing with fatty acids or vegetable oils, the industry standard test is Iodine number. For petroleum products, the standard test is Bromine number (or bromine index, slightly different). For the two tests, Reference Bailey's Industrial Oil and Fat Products, sixth ed. vol. 1 pg. 172, and ASTM D-1159.
Could you add some information to support a conclusion and answer the question? While your post is useful, it is more appropriate as a comment or two than an answer.More
Bromine number (and Bromine Index) are based on theoretically good chemistry; however, that is where their virtues end. If these tests are run according to the current ASTM procedures, you are virtually guaranteed to get an incomplete reaction and low (perhaps as much as 50%) results. When properly applied, off the shelf equipment can result in exceptionally good accuracy and precision, but it does require a deviation from ASTM-accepted technology.
Bromine number (and Bromine Index) are based on theoretically good chemistry; however, that is where their virtues end. If these tests are run according to the current ASTM procedures, you are virtually guaranteed to get an incomplete reaction and low (perhaps as much as 50%) results. When properly applied, off the shelf equipment can result in exceptionally good accuracy and precision, but it does require a deviation from ASTM-accepted technology.
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Which is better for measuring unsaturation, Iodine number or Bromine number? The answer depends on how you define "better". However I can tell you which is commercially useful. If we're dealing with fatty acids or vegetable oils, the industry standard test is Iodine number. For petroleum products, the standard test is Bromine number (or bromine index, slightly different). For the two tests, Reference Bailey's Industrial Oil and Fat Products, sixth ed. vol. 1 pg. 172, and ASTM D-1159.
Which is better for measuring unsaturation, Iodine number or Bromine number? The answer depends on how you define "better". However I can tell you which is commercially useful. If we're dealing with fatty acids or vegetable oils, the industry standard test is Iodine number. For petroleum products, the standard test is Bromine number (or bromine index, slightly different). For the two tests, Reference Bailey's Industrial Oil and Fat Products, sixth ed. vol. 1 pg. 172, and ASTM D-1159.
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