US4380587A
Expired / Lapsed
US
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Film badge for determining carbonyl compounds
Assignee: Arthur D Little Inc
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Filing: 1981-08-20
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Granted: 1983-04-19
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Expires: 2001-08-20
Abstract
Abstract Method for the determination of fluidic-contained aldehydes. The method comprises bringing into contact said aldehyde and a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for the aldehydes thereby forming nucleating crystals; treating said nucleating crystals with a metastable supersaturated solution in which said nucleating crystals can grow; growing said nucleating crystals to form an optically measurable film of crystals; and optically measuring said film of crystals to determine the concentration of fluidic-contained aldehydes.
Inventors
- 👤 Martin Koocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:23
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; G01N31/00; G01N31/22; G01N31/223; G01N31/224; Y; Y10; Y10S; Y10S436/00; Y10S436/902; Y10T; Y10T436/00; Y10T436/20; Y10T436/200833
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
85 words
A method for determining fluidic-contained aldehyde comprising a. contacting a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for the aldehyde with the fluidic-contained aldehyde to form nucleating sites; b. treating said nucleating sites with a metastable supersaturated solution in which said nucleating sites can grow; c. growing said nucleating sites to form an optically measurable film of crystals; and d. optically measuring said film of crystals to determine the concentration of fluidic-contained aldehyde.
Claim 2
Independent Claim
85 words
A method for determining fluidic-contained aldehyde comprising a. contacting a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for the aldehyde with the fluidic-contained aldehyde to form nucleating sites; b. treating said nucleating sites with a metastable supersaturated solution in which said nucleating sites can grow; c. growing said nucleating sites to form an optically measurable film of crystals; and d. optically measuring said film of crystals to determine the concentration of fluidic-contained aldehyde.
Claim 3
Dependent Claim
15 words
The method according to claim 1 wherein said chemically inert substrate is a polymeric film.
Claim 4
Dependent Claim
69 words
The method according to claim 2 wherein said derivatizing agent for said fluidic-contained aldehyde is adipic dihydrazide; benzoylhydrazine; isonicotinic acid hydrazide; nicotinic acid hydrazide; oxalyl dihydrazide; oxamic hydrazide; salicylhydrazide; 2,4-dinitrophenylhydrazine; semicarbazide; dimethone or dimedone; p-nitrophenylhydrazine; phenylhydrazine; thiosemicarbazide; bromobenzohydrazine (o,m,p); 2,4-dinitromethylphenylhydrazine; p-carboxphenylhydrazine; nitrobenzenesulfonhydrazine; p-nitrobenzohydrazine; diphenylhydrazine; 2-naphthylhydrazine; p-chlorobenzohydrazine; m-chlorobenzohydrazine; nitroguanylhydrazine; α-(α,4-nitrophenyl)-α-methylhydrazine; xenylsemicarbazide; tolylsemicarbazide (o,m,p); phenylsemicarbazide; 1-naphthylsemicarbazide; 2-naththylsemicarbazide; 3,5-dinitrophenylsemicarbazide; dibromomethone; benzothiazole; benzothiazoline; aminomorpholines; hydrazinobenzoic acid; 5-(1-phenylmethyl)semioxazide 1,3-cyclohexadione; 1,2-bis(p-methoxybenzylamino)ethane or p-hydroxybenzoic acid anhydride.
Claim 5
Dependent Claim
17 words
The method according to claim 3 wherein said sites are 0.01 μm to 1.0 μm in size.
Claim 6
Dependent Claim
75 words
The method according to claim 1 wherein said supersaturated/metastable solution is an aqueous solution of the fluidic-contained aldehyde reaction product of adipic dihydrazide; benzoylhydrazine; isonicotinic acid hydrazide; nicotinic acid hydrazide; oxalyl dihydrazide; oxamic hydrazide; salicylhydrazide; 2,4-dinitrophenylhydrazine; semicarbazide; dimethone or dimedone; p-nitrophenylhydrazine; phenylhydrazine; thiosemicarbazide; bromobenzohydrazine (o,m,p); 2,4-dinitromethylphenylhydrazine; p-carboxyphenylhydrazine; nitrobenzenesulfonhydrazine; b-nitrobenzohydrazine; diphenylhydrazine; 2-naphthylhydrazine; p-chlorobenzohydrazine; m-chlorobenzohydrazine; nitroguanylhydrazine; α-(α,4-nitrophenyl)-α-methylhydrazine; xenylsemicarbazide; tolylsemicarbazide (o,m,p); phenylsemicarbazide; 1-naphthylsemicarbazide; 2-napthylsemicarbazide; 3,5-dinitrophenylsemicarbazide; dibromomethone; benzothiazole; benzothiazoline; aminomorpholines; hydrazinobenzoic acid; 5-(1-phenylmethyl)semioxazide; 1,3-cyclohexadione; 1,2-bis(p-methoxybenzylamino)ethane or p-hydroxybenzoic acid hydrazide.
Claim 7
Dependent Claim
98 words
A film badge useful for determining the presence or time-average amounts of fluidic-contained aldehyde comprising a container having a chamber therein, said chamber enclosing a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for said aldehyde, the size of said particles being in the micron to submicron range, and superimposed on said chamber and said substrate a porous fluid flow attenuating layer, said porous fluid flow attenuating layer causing the flow of said fluidic-contained aldehyde to contact said substrate layer to form nucleating sites for crystal growth.
Claim 8
Dependent Claim
98 words
A film badge useful for determining the presence or time-average amounts of fluidic-contained aldehyde comprising a container having a chamber therein, said chamber enclosing a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for said aldehyde, the size of said particles being in the micron to submicron range, and superimposed on said chamber and said substrate a porous fluid flow attenuating layer, said porous fluid flow attenuating layer causing the flow of said fluidic-contained aldehyde to contact said substrate layer to form nucleating sites for crystal growth.
Claim 9
Independent Claim
91 words
A method for determining a fluidic-contained carbonyl compound comprising a. contacting a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for the carbonyl compound with the fluidic-contained carbonyl compound to form nucleating sites; b. treating said nucleating sites with a metastable supersaturated solution in which said nucleating sites can grow; c. growing said nucleating sites to form an optically measurable film of crystals; and d. optically measuring said film of crystals to determine the concentration of fluidic contained carbonyl compound.
Claim 10
Independent Claim
91 words
A method for determining a fluidic-contained carbonyl compound comprising a. contacting a chemically inert substrate having adhered to the surface thereof a substantially monodisperse system of particles of a derivatizing agent for the carbonyl compound with the fluidic-contained carbonyl compound to form nucleating sites; b. treating said nucleating sites with a metastable supersaturated solution in which said nucleating sites can grow; c. growing said nucleating sites to form an optically measurable film of crystals; and d. optically measuring said film of crystals to determine the concentration of fluidic contained carbonyl compound.
Claim 11
Dependent Claim
21 words
The method of claim 7 wherein said carbonyl compound is selected from the group consisting of ketones, ketoesters, ketoacids and isocyanates.
Claim 12
Dependent Claim
68 words
The method of claim 8 wherein the derivatizing agent for said carbonyl compound is adipic dihydrazide; benzoylhydrazide; isonicotinic acid hydrazide; nicotinic acid hydrazide; oxalyl dihydrazide; oxamic hydrazide; salicylhydrazide; 2,4-dinitrophenylhydrazine; semicarbazide; dimethone or dimedone; p-nitrophenylhydrazine; phenylhydrazine; thiosemicarbazide; bromobenzohydrazine (o.m.p.); 2,4-dinitromethylphenylhydrazine; p-carboxyphenylhydrazine; nitrobenzenesulfonhydrazine; p-nitrobenzohydrazine; diphenylhydrazine; 2-naphthylhydrazine; p-chlorobenzohydrazine; m-chlorobenzohydrazine; nitroguanylhydrazine; α-(α,4-nitrophenyl)-αmethylhydrazine; xenylsemicarbazide; tolylsemicarbazide (o.m.p.); phenylsemicarbazide; 1-naphthylsemicarbazide; 2-naphthylsemicarbazide; 3,5-dinitrophenylsemicarbazide; dibromomethone; benzothiazole; benzothiazoline; aminomorpholines; hydrazinobenzoic acid; 5-(1-phenylmethyl)semioxazide; 1,3-cyclohexadione; 1,2-bis(p-methoxybenzylamino)ethane or p-hydroxybenzoic acid hydrazide.
Claim 13
Dependent Claim
17 words
The method of claim 9 wherein said nucleating sites at 0.01 μm to 1.0 μm in size.
References Cited (Backward Citations)
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