Process and apparatus for the detection of hydrazine and hydrazine derivatives

A process for the colorimetric detection of hydrazine and volatile hydrazine derivatives in air comprising the step of bringing air containing said hydrazine or volatile hydrazine derivative into contact with a solid support containing an ion selected from the group consisting of iodate ion and periodate ion, an oxidizing metal ion and a colorimetric indicator for iodine selected from the group consisting of addition-complex type indicators and iodination type dye precursors.

A process for the colorimetric detection of hydrazine and volatile hydrazine derivatives in air comprising the step of (1) bringing air containing said hydrazine or volatile hydrazine derivative into a reactor zone containing an ion selected from the group consisting of iodate ion and periodate ion to thereby form iodine and (2) allowing said iodine to diffuse from said reactor zone to an indicator zone containing a colorimetric indicator which changes color in the presence of iodine said indicator zone further comprising an oxidizing metal ion.

A process for the colorimetric detection of hydrazine and volatile hydrazine derivatives in air comprising the steps of (1) bringing air containing said hydrazine or volatile hydrazine derivative into a reactor zone containing an ion selected from the group consisting of iodate ion and periodate ion to thereby form iodine and (2) allowing said iodine to diffuse from said reactor zone to an indicator zone containing a colorimetric indicator which visibly changes color in the presence of iodine said reactor zone further comprising an oxidizing metal ion.

A detector tube for the detection of hydrazine and volatile hydrazine derivatives in air comprising a reactor zone and an indicator zone, said reactor zone and indicator zone both being open to the atmosphere, and wherein said reactor zone contains reagents comprising an ion selected from the group consisting of iodate ion and periodate ion and wherein said indicator zone is at least partially transparent and contains a colorimetric indicator for iodine, said indicator zone further comprising an oxidizing metal ion.

A detector tube device for the detection of hydrazine and volatile hydrazine derivatives in air comprising a reactor zone and an indicator zone, said reactor zone being open to the atmosphere and wherein said reactor zone contains reagents comprising an ion selected from the group consisting of iodate ion and periodate ion and said indicator zone is at least partially transparent and contains a colorimetric indicator for iodine, and wherein further said indicator zone is associated with a pumping means whereby said pumping means draws air containing hydrazine or volatile hydrazine derivative into said reactor zone and draws iodine formed therein into the indicator zone where said iodine may react with the colorimetric indicator contained therein, said pumping means is a hand piston pump, and said indicator zone further comprising an oxidizing metal ion.

A detector tube for the detection of hydrazine and volatile hydrazine derivatives in air comprising a reactor zone and an indicator zone, said reactor zone and indicator zone both being open to the atmosphere, and wherein said reactor zone contains reagents comprising an ion selected from the group consisting of iodate ion and periodate ion and wherein said indicator zone is at least partially transparent and contains a colorimetric indicator for iodine, said reactor zone further comprising an oxidizing metal ion.

A detector tube device for the detection of hydrazine and volatile hydrazine derivatives in air comprising a reactor zone and an indicator zone, said reactor zone being open to the atmosphere and wherein said reactor zone contains reagents comprising an ion selected from the group consisting of iodate ion and periodate ion and said indicator zone is at least partially transparent and contains a colorimetric indicator for iodine, and wherein further said indicator zone is associated with a pumping means whereby said pumping means draws air containing hydrazine or volatile hydrazine derivative into said reactor zone and draws iodine formed therein into the indicator zone where said iodine may react with the colorimetric indicator contained therein, said pumping means is a hand piston pump, and said reactor zone further comprising an oxidizing metal ion.