Gas-dortmund.de - SEO Checker

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Overview of the SEO Check
Meta information
63% 
Page quality
77% 
Page structure
29% 
Link structure
25% 
Server
100% 
External factors
48% 
SEO Score
Response time
0.14 s
File size
38.90 kB
Words
641
Media files
14
Number of links
105 internal / 2 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
GAS Dortmund
The page title is too short. (136 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is empty.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
http://www.gas-dortmund.de/
The specified canonical link points to a different page.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: Germany
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1.0
descriptionEmpty
authorEmpty
langen
charsetutf-8

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Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
This page contains 641 words. That's ok.
26.5% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
8 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 13.37 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
Empty bold or strong tags were found on this page.
Image SEO
(Somewhat important)
1 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/images/cms/fahnen/german.gifdeutsch
/images/cms/fahnen/english.gifenglish
/images/cms/fahnen/chinesisch.gifchinesisch
...strap/images/artwork/logo-gas-navbar.pnglogo-gas-navbar
...ap/images/artwork/logo-gas-navbar-xs.pnglogo-gas-navbar
...mages/Startseite/oelmotiv_2018_GAS_3.jpgoelmotiv_2018_GASoelmotiv_2018_GAS
...s/images/Startseite/process_control1.jpgprocess_control1process_control1
/data-live-gas/images/Startseite/lunge2.jpglunge2lunge2
...ve-gas/images/Startseite/custombuilt.jpgcustombuiltcustombuilt
.../images/Technology/GC_IMS_technology.jpgims_tubeims_tube
...cations/iStock_000075093057_XXXLarge.jpgiStock_000075093057_XXXLargeiStock_000075093057_XXXLarge
...endungen/iStock_000052612384_Double2.jpgiStock_000052612384_Double2iStock_000052612384_Double2
...p/images/teaserbox/unternehmensvideo.jpgNo alt attribute provided
...strap/images/artwork/logo-gas-footer.pngLogo Gas Dortmund

Page structure

H1 heading
(Critically important)
Trace Detection of Flavour inducing Volatiles without Sample pre-treatment
Too many H1 headings
Headings
(Important)
Some headings occur twice on the page.
There are 36 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 Trace Detection of Flavour inducing Volatiles without Sample pre-treatment
H1 Gas Chromatography (GC) coupled to Ion Mobility Spectrometry (IMS)
H1 Matrix Impact on Flavour Development
H1 Odour Source Identification and Support of industrial Odour Management
H2 Instruments
H2 Software
H2 Product Quality Control
H2 Industry & Process-Control
H2 Human Breath Analysis
H2 Measurable Substances
H2 IMS Working Principle
H2 GC-IMS Coupling
H2 Software Duplicate text
H2 G.A.S. distributors
H2 References
H2 Mission / Company Video
H2 Description
H2 Jobs
H2 Location
H2 General terms
H2 GC-IMS technology applied by G.A.S.
H2 GC-IMS technology applied by G.A.S. Duplicate text
H2 Understand how a change in formulation of food or beverage affects the product's flavour.
H2 Understand how a change in formulation of food or beverage affects the product's flavour. Duplicate text
H2 GC-IMS technology allows to monitor complex odour containing VOC mixtures.
H2 GC-IMS technology allows to monitor complex odour containing VOC mixtures. Duplicate text
H2 Company-Video
H2 News all
H2 Dates all
H2 Customer who trust us all
H3 Trace Detection of Flavour inducing Volatiles without Sample pre-treatment Duplicate text
H3 Sensitive Testing of Mal-odours, Toxic Compounds in Air and Industrial Gases
H3 Human Breath Analysis Duplicate text
H3 Tailor-Made Solutions
H4 Test of Siloxanes
H4 GC-IMS becomes the new ISO-standard 2613-2 to test for silicon content in biomethane
Baselink: https://www.gas-dortmund.de/
Some internal link anchor texts are too long.
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
3 links don't have an anchor text.
There are 7 links with a trivial anchor text.
The number of internal links is ok.
There are 2 external links on this page.

Found links on this page

LinkAttributesAnchor text
/?lan=0Deutsch
IMG-ALT deutsch
/?lan=1English
IMG-ALT english
/?lan=2Chinese
IMG-ALT chinesisch
/homepage/1_101.htmlHome
/Global-Sales/G-A-S-distributo...Worldwide
/sitemap/1_115.htmlSitemap
/Contact/E-Mail/1_107.htmlContact
/Company/General-terms/1_353.htmlGTC
/index.php?spath=101IMG-ALT logo-gas-navbar
/Products/1_354.htmlProducts
A-TITLE Products
/Products/Instruments/1_410.htmlInstruments
A-TITLE Instruments
/Products/Instruments/FlavourS...FlavourSpec
A-TITLE FlavourSpec
/Products/Instruments/BreathSp...BreathSpec
A-TITLE BreathSpec
/Products/Instruments/Analytic...Analytical-IMS
A-TITLE Analytical-IMS
/Products/Instruments/N2-Gener...N2-Generator
A-TITLE N2-Generator
/Products/Instruments/Ion-Mobi...Ion Mobility Spectrometer
A-TITLE Ion Mobility Spectrometer
/Products/Instruments/GC-IMS/1...GC-IMS
A-TITLE GC-IMS
/Products/Instruments/GC-IMS-S...GC-IMS-SILOX
A-TITLE GC-IMS-SILOX
/Products/Instruments/GC-IMS-O...GC-IMS-ODOR
A-TITLE GC-IMS-ODOR
/Products/Instruments/Agilent-...Agilent 490 Micro GC with IMS
A-TITLE Agilent 490 Micro GC with IMS
/Products/Instruments/Precisio...Precision Gas Dilutor
A-TITLE Precision Gas Dilutor
/Products/Software/1_411.htmlSoftware
A-TITLE Software
/Products/Software/VOCal---Sof...VOCal – Software for GC-IMS Data
A-TITLE VOCal – Software for GC-IMS Data
/Products/Software/VOCal-Free-...VOCal Free Demo Version
A-TITLE VOCal Free Demo Version
/Products/Software/FlavourSpec...FlavourSpec 25 Remote Control
A-TITLE FlavourSpec 25 Remote Control
/Products/Software/Firmware-4-...Firmware 4.6
A-TITLE Firmware 4.6
/Applications/1_308.htmlApplications
A-TITLE Applications
/Applications/Product-Quality-...Product Quality Control
A-TITLE Product Quality Control
/Applications/Product-Quality-...Terpene analysis to determine Canabis quality
A-TITLE Terpene analysis to determine Canabis quality
/Applications/Product-Quality-...Matrix impact on flavour development
A-TITLE Matrix impact on flavour development
/Applications/Product-Quality-...Beer brewing: Analysis and quality control
A-TITLE Beer brewing: Analysis and quality control
/Applications/Product-Quality-...Rancidity of fried Products and frying Oil
A-TITLE Rancidity of fried Products and frying Oil
/Applications/Product-Quality-...Comprehensive testing of green tea
A-TITLE Comprehensive testing of green tea
/Applications/Product-Quality-...Differentiation and authentication of rice
A-TITLE Differentiation and authentication of rice
/Applications/Product-Quality-...Tobacco and Cigarettes
A-TITLE Tobacco and Cigarettes
/Applications/Product-Quality-...Analysis of olive oil
A-TITLE Analysis of olive oil
/Applications/Product-Quality-...Milk and diary products
A-TITLE Milk and diary products
/Applications/Product-Quality-...Acetaldehyde
A-TITLE Acetaldehyde
/Applications/Product-Quality-...Selective Ultra-Trace-Analysis
A-TITLE Selective Ultra-Trace-Analysis
/Applications/Industry-Process...Industry & Process-Control
A-TITLE Industry & Process-Control
/Applications/Industry-Process...Monitoring of Toxic Industrial Chemicals
A-TITLE Monitoring of Toxic Industrial Chemicals
/Applications/Industry-Process...Detection of Catalyst Poisons
A-TITLE Detection of Catalyst Poisons
/Applications/Industry-Process...NOx-Detection at ppb-Level
A-TITLE NOx-Detection at ppb-Level
/Applications/Industry-Process...On-site Car Interior Analyses
A-TITLE On-site Car Interior Analyses
/Applications/Industry-Process...Monitoring of Odorants in Natural Gas
A-TITLE Monitoring of Odorants in Natural Gas
/Applications/Industry-Process...Sub-ppm Sulfur Quantification
A-TITLE Sub-ppm Sulfur Quantification
/Applications/Industry-Process...Siloxanes in landfill/sewage gases
A-TITLE Siloxanes in landfill/sewage gases
/Applications/Industry-Process...Propellant Gases
A-TITLE Propellant Gases
/Applications/Industry-Process...Industrial odour management
A-TITLE Industrial odour management
/Applications/Human-Breath-Ana...Human Breath Analysis
A-TITLE Human Breath Analysis
/Applications/Human-Breath-Ana...VOC markers in Human Breath
A-TITLE VOC markers in Human Breath
/Applications/Human-Breath-Ana...Markers of Poisoning in Breath
A-TITLE Markers of Poisoning in Breath
/Applications/Measurable-Subst...Measurable Substances
A-TITLE Measurable Substances
/Applications/Measurable-Subst...List of measurable substances
A-TITLE List of measurable substances
/Technology/1_387.htmlTechnology
A-TITLE Technology
/Technology/IMS-Working-Princi...IMS Working Principle
A-TITLE IMS Working Principle
/Technology/GC-IMS-Coupling/1_...GC-IMS Coupling
A-TITLE GC-IMS Coupling
/Technology/GC-IMS-Coupling/Do...Downloads
A-TITLE Downloads
/Technology/Software-/1_461.htmlText duplicate Software
A-TITLE Software
/Global-Sales/1_395.htmlGlobal Sales
A-TITLE Global Sales
/Global-Sales/G-A-S-distributo...G.A.S. distributors
A-TITLE G.A.S. distributors
/Company/1_325.htmlCompany
A-TITLE Company
/Company/References/1_479.htmlReferences
A-TITLE References
/Company/Mission-/-Company-Vid...Mission / Company Video
A-TITLE Mission / Company Video
/Company/Description/1_327.htmlDescription
A-TITLE Description
/Company//1_507.htmlJobs
A-TITLE Jobs
/Company/Location/1_328.htmlLocation
A-TITLE Location
/Company/General-terms/1_353.htmlGeneral terms
A-TITLE General terms
/index.php?spath=380Trivial anchor text
read more
/index.php?spath=381Text duplicate Trivial anchor text
read more
/index.php?spath=382Text duplicate Trivial anchor text
read more
/index.php?spath=367Text duplicate Trivial anchor text
read more
https://www.gas-dortmund.de/Anchor No Text
https://www.gas-dortmund.de/Anchor No Text
/index.php?spath=389No Text
/Technology/IMS-Working-Princi...IMG-ALT ims_tube
A-TITLE ims_tube
/index.php?spath=389Text duplicate Trivial anchor text
read more
/index.php?spath=383No Text
/Applications/Product-Quality-...IMG-ALT iStock_000075093057_XXXLarge
A-TITLE iStock_000075093057_XXXLarge
/index.php?spath=383Text duplicate Trivial anchor text
read more
/index.php?spath=458No Text
/index.php?spath=458Text duplicate Trivial anchor text
read more
/index.php?spath=371Text duplicate Deutsch
A-TITLE Germany
/index.php?spath=372Text duplicate English
A-TITLE English
/index.php?spath=373Francais
A-TITLE France
/index.php?spath=374Italian
A-TITLE Italian
/index.php?spath=394Japanese
A-TITLE Japan
/index.php?spath=375Mandarin
A-TITLE China
/index.php?spath=376Spanish
A-TITLE Spain
/index.php?spath=377Korean
A-TITLE Korea
/index.php?spath=106all
https://www.astm.org/d8455-22....New window External Subdomain www.astm.org
https://www.iso.org/standard/8...New window External Subdomain www.iso.org
/index.php?spath=406Text duplicate all
/index.php?spath=407Meet us at analyticaUSA in Columbus from September 10-12th, booth 449.
/index.php?spath=519Meet us during the ISIMS conference 2025 between August 2nd-8th
/?spath=413Text duplicate all
/index.php?spath=414"We find the FlavourSpec to be very well suited to the needs of the research brewery for both basic beer analysis and advanced testing of beer."
/index.php?spath=415"...we are pleased to recommend the FlavourSpec to any food and/or beverage company considering the use of GC-IMS technology... "
/index.php?spath=540“…we appreciate the application of FlavourSpec in terms of robustness, easy-to-use system, immediate outcome with good visualization impact.”
/index.php?spath=496"...the FlavourSpec stands out due to its ease in use, ruggedness as well as its user friendly software so that we enjoy working with it a lot...."
/index.php?spath=515…the GC-IMS-SILOX operates accurate and reliable on-site regarding the detection and automated quantification of siloxanes of our landfill gas.
/index.php?spath=107Text duplicate Contact
/index.php?spath=115Text duplicate Sitemap
/index.php?spath=353Terms and conditions
/index.php?spath=224Imprint
/index.php?spath=508Privacy Policy

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.gas-dortmund.de/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.14 seconds.
The file size of the HTML document is fine (39 kB).

HTTP Response Header

NameValue
servernginx
dateSat, 26 Jul 2025 16:15:41 GMT
content-typetext/html; charset=utf-8
content-length8370
set-cookie50 Characters
varyAccept-Encoding
content-encodinggzip
statuscode200
http_versionHTTP/2

External factors

This page has only a few links from other websites.
This page only has backlinks from 16 referring domains.
This page only has 34 backlinks.
This page only has few backlinks from 16 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

User-agent: *
Disallow: /*print=1

Similar sites

Search preview

www.gas-dortmund.de
GAS Dortmund

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Gas72%Check
GAS Dortmund64%Check
Industrial Gas57%Check
Ion56%Check
Dortmund56%Check
gas chromatography56%Check
flavour54%Check
Detection54%Check
Trace54%Check
Sample54%Check
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Cookie Policy

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