Formaldehyde test element and method of use

Details Formaldehyde test element and method of use Formaldehyde test element and method of use

1974-05-20

1976-03-23

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

23253TP, G01N 3122

Patent

active

039457982

ABSTRACT:
A test element is provided which can detect and measure extremely low concentrations of formaldehyde in the environment. The test strip comprises a support having thereon a formaldehyde-sensitive layer comprising an inert formaldehyde-permeable binder which stabilizes sulphite ions against aerial oxidation having dispersed therein pararosaniline or an acid derivative thereof and sulphite ions. The test element requires no processing and can be fixed to obtain a permanent record.

REFERENCES:
patent: 3092463 (1963-06-01), Adams, Jr. et al.
patent: 3099605 (1963-07-01), Free
patent: 3232710 (1966-02-01), Rieckmann et al.
patent: 3252762 (1966-05-01), Adams, Jr. et al.
patent: 3290228 (1966-12-01), Gretton et al.
patent: 3443903 (1969-05-01), Haack et al.
patent: 3447905 (1969-06-01), Shand
patent: 3502437 (1970-03-01), Mass
patent: 3544275 (1970-12-01), Habermas et al.
patent: 3635677 (1972-01-01), Drake, Jr. et al.
patent: 3642450 (1972-02-01), Eriksson
patent: 3645696 (1972-02-01), Iannacone et al.
patent: 3837809 (1974-09-01), Chapman
patent: 3843325 (1974-10-01), Schmitt et al.
Blaedel et al., "Colorimetric Determination of Formaldehyde in the Presence of Other Aldehydes"; Anal. Chem., Vol. 13, 1941, pp. 449-450.
Kramm et al. "Schiff Reagent"; Anal. Chem., Vol. 27, 1955, pp. 1076-1079.
Nauman et al. "A Spectrophotometric Study of the Schiff Reaction as Applied to the Quantitative Determination of So.sub.2 ; Anal. Chem., Vol. 32, 1960, pp. 1307-1311; Group 171.

Affiliated with

Also associated with

Rating

Formaldehyde test element and method of use does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Formaldehyde test element and method of use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formaldehyde test element and method of use will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1641369