Chemical Engineering April 2021 - 20

Mettler Toledo Process Analytics
Dynatrol
prevention in chlor-alkali plants. The
response time of the GPro 500 TDL
moisture sensor is below 4 s, which
is up to 50 times faster than commonly
used phosphorus pentoxide
sensors. In situ installation with the
GPro 500 can avoid risks of toxic
gas leaks and the frequent maintenance
typical of extractive systems
used with P2O5 sensors. The new
dual-gas CO ppm/CH4 % GPro 500
analyzer is designed for combustion
applications, which allows measurement
of CO in the presence of CH4.
Moreover, in large furnaces with multiple
burners, CH4 measurement provides
additional security by detecting
a possible malfunctioning burner that
has not ignited or ignited only partially.
The GPro 500's new MR3 Cell
enables O2 measurement in small
pipes. With patented technology, the
MR Cell multiplies the path length by
a factor of 2 to 3, therefore lowering
the detection limit achievable in small
spaces. - Mettler Toledo Process
Analytics, Urdorf, Switzerland
www.mt.com/pro
Inline viscosity measurement of
coatings and resins
Metrohm
Designed for high accuracy with fast
and continuous readings, the Dynatrol
CL-10DV viscometer (photo) operates
in a wide range of conditions.
It provides excellent results for coatings
and resins, as well as supplying
outstanding repeatability in Newtonian
or shear-thinning liquids. The
viscometer utilizes a unique vibratory
principle to provide continuous
measurement at online process conditions.
This eliminates the need for
sampling and provides exceptional
accuracy. With no moving parts, it
is virtually wear-free, ensuring a long
operating life. The instrument is CSA
NRTL/C approved for Class 1 Group
D Div 1. - Automation Products,
Inc. - Dynatrol Div., Houston
www.dynatrolusa.com
Shimadzu Scientific Instruments
Technique approved for water
content in petrochemicals
Since they can be poorly soluble, viscous
and often highly contaminated,
determining the water content in lubricants,
hydraulic oils and other petrochemical
samples can challenging.
Addressing these challenges, ASTM
has revised standard method D6304.
The revised standard now includes
the Karl Fischer (KF) oven technique.
20
Users can conveniently and accurately
determine water content in up to 35
samples automatically by coulometric
Karl Fischer titration (photo). Using the
KF oven technique, the oil matrix does
not come into contact with the titration
cell at all. Instead, the samples
are introduced in single-use vials,
which are put on the rack of an oven
sample processor. Heating vial by vial,
the water contained in the samples is
evaporated. A constant stream of an
inert carrier gas is used to bring the
water fraction into the titration cell,
where it is determined coulometrically.
The sample matrix stays in the vials,
which are disposed of after the titration.
The benefits of this method are
considerable, including: no contamination
of the KF titration cell; no matrix
interferences; less solvents needed;
and better reproducibility of results. -
Metrohm AG, Herisau, Switzerland
www.metrohm.com
Space-saving autoinjector/
autosampler for GC
The AOC-30 Series autoinjector/autosampler
(photo) is designed to enable
gas chromatography (GC) users
to produce high-quality results with
less downtime. The AOC-30 automatic
sample-injection system automates
analysis, reduces an operator's
workload, and enables continuous
analysis with a high degree of accuracy
that cannot be achieved by
manual operation. The structure of
the company's Xtra Life inlet septa
results in excellent injection durability
and enables continuous analysis that
is approximately ten times that of conventional
systems - up to 1,000 injections
before replacement, says the
company. Advanced sample-washing
functionality provides continuous analysis
without the worry of running out of
solvent. Four 4-mL vials can be used
in a single tower, and twelve 4 mL-vials
can be used with the full tower and
sampler system. Users can customize
cleaning solvent types and cleaning
sequences to optimize the cleaning
effect for each analysis. The singletower
system provides automated
analysis of up to 30 samples, covering
a wide range of analysis needs. Another
sample tower or samplers can
be added to increase analysis capacity
and flexibility. - Shimadzu Scientific
Instruments Inc., Columbia, Md.
www.ssi.shimadzu.com

Gerald Ondrey
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM APRIL 2021
http://www.metrohm.com http://www.mt.com/pro http://www.dynatrolusa.com http://www.ssi.shimadzu.com http://WWW.CHEMENGONLINE.COM
Chemical Engineering April 2021

Table of Contents for the Digital Edition of Chemical Engineering April 2021
