JPS56141557A - Measuring method for formaldehyde in waste gas of automobile - Google Patents

Measuring method for formaldehyde in waste gas of automobile

Info

Publication number
JPS56141557A
JPS56141557A JP4539880A JP4539880A JPS56141557A JP S56141557 A JPS56141557 A JP S56141557A JP 4539880 A JP4539880 A JP 4539880A JP 4539880 A JP4539880 A JP 4539880A JP S56141557 A JPS56141557 A JP S56141557A
Authority
JP
Japan
Prior art keywords
waste gas
formaldehyde
continuously
automobile
nitrophenyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4539880A
Other languages
Japanese (ja)
Inventor
Okifumi Kageyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Toyo Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mazda Motor Corp, Toyo Kogyo Co Ltd filed Critical Mazda Motor Corp
Priority to JP4539880A priority Critical patent/JPS56141557A/en
Publication of JPS56141557A publication Critical patent/JPS56141557A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • G01N31/223—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols
    • G01N31/224—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating presence of specific gases or aerosols for investigating presence of dangerous gases

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

PURPOSE:To continuously measure the formaldehyde in waste gases of automobiles by continuously adding a weak acidic soln. of dinitrophenyl hydrazine and determining the turbidity by the formed di-nitrophenyl hydrazone particles. CONSTITUTION:Part of the waste gas of an automobile is introduced through a filter 1a, a pump 1 and a control valve 1b into a measuring pipe 2, whilist a hydrochloric acid soln. of dinitrophenyl hydrazine is added and mixed continuously to and with this from a storage tank 3 through a control valve 4a and an outflow pipe 4. While the above-mentioned gaseous mixture are passing through a spiral pipe part 2a, the formaldehyde and di-nitrophenyl hydrazine in the waste gas react and di- nitrophenyl hydrazone particles S are formed, due to which the gaseous mixture is made turbid. The measured value obtained by continuously measuring this turbidity with a turbidimeter 5 provided with a flow cell is converted to the aldehyde amount in the waste gas.
JP4539880A 1980-04-07 1980-04-07 Measuring method for formaldehyde in waste gas of automobile Pending JPS56141557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4539880A JPS56141557A (en) 1980-04-07 1980-04-07 Measuring method for formaldehyde in waste gas of automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4539880A JPS56141557A (en) 1980-04-07 1980-04-07 Measuring method for formaldehyde in waste gas of automobile

Publications (1)

Publication Number Publication Date
JPS56141557A true JPS56141557A (en) 1981-11-05

Family

ID=12718143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4539880A Pending JPS56141557A (en) 1980-04-07 1980-04-07 Measuring method for formaldehyde in waste gas of automobile

Country Status (1)

Country Link
JP (1) JPS56141557A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140886A1 (en) * 1983-04-13 1985-05-15 Little Inc A Film badge for determining carbonyl compounds.
JPS63298158A (en) * 1987-05-29 1988-12-05 Toyota Motor Corp Continuous analyzer for carbonyl compound in exhaust gas
JPH01171351U (en) * 1988-05-24 1989-12-05

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140886A1 (en) * 1983-04-13 1985-05-15 Little Inc A Film badge for determining carbonyl compounds.
JPS63298158A (en) * 1987-05-29 1988-12-05 Toyota Motor Corp Continuous analyzer for carbonyl compound in exhaust gas
JPH01171351U (en) * 1988-05-24 1989-12-05

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