Who Dat Back In NOLA? Sper Scientific Dats Who!

The American Water Works Association hosts its annual Water Quality Technology Conference (WQTC) and Exposition Convention and Exposition in New Orleans November 16-20, 2014.  This established and highly regarded conference provides a practical forum for a wide range of water professionals to exchange the latest research and information. The Opening Session will highlight the 40th anniversary of the Safe Water Drinking Act featuring Peter Grevatt, Chief of USEPA’s Office of Ground Water and Drinking Water, and David LaFrance, AWWA CEO in a discussion on AWWA’s Total Water Solutions™.

2014 will mark the second time that Sper Scientific (Booth 700) will exhibit at WQTC.  Sper Scientific’s focus at the event is to help water professionals optimize their processes and to demonstrate its lineup of innovative water quality products.

Sper Scientific delivers dependable, accurate water quality measurement devices to monitor the changes in water over time from seasonal variations, weather, as well as, man-made pollution. Whether you are in agriculture, aquaculture, industry, education, power generation, or municipal waste water, Sper Scientific offers a complete line of water quality meters, to test the acidity, alkalinity, conductivity, dissolved oxygen (DO), Oxygen Reduction Potential (ORP), of your water.

How Safe Is Your Sushi Rice?

We learned from one of our customers that sushi rice has the potential to become a host for pathogens if not properly prepared. To protect against this, it is imperative that proper amounts of vinegar are added to maintain optimum acidity.

To ensure proper acidity levels are achieved, a pH meter should be used to test each batch of rice. A maximum pH reading of under 4.6 is generally considered safe.  In many states, there are specific laws in place that state sushi rice pH MUST be between 4.1-4.6. 

There are two different ways that you can measure the pH of sushi rice.  Method one is to use a pH meter with a probe for measuring non-liquid items such as rice. We used the Sper Scientific Basic pH Meter (840087) in our experiment and a Spear Tipped pH probe (840049), which is designed especially for measuring non-liquid items.  We also used Sper Scientific Large Display pH Pen (850050) and compared the methods.

The meter and probe is by far the easier of two methods in that you can simply insert the spear tipped probe into rice and get your reading.  In order to use the pH pen you have to make a slurry (instructions below) in order to take your readings.  When using the slurry method you need to ensure there is enough moisture in the rice for the electrode to be fully saturated. In either case, you should conduct a pH test within 30 minutes after acidification of cooked rice to accurately test your sushi rice.

To make a rice slurry you start by gathering a ¼ cup sample of cooked, acidified rice taken from various locations in the batch and add ¾ cup of distilled water in a clear cup. Blend the slurry for 20 seconds to create a thorough mix. Once you have created your slurry mix you insert the pH pen in the mixture and let it rest for few seconds before you take your reading.

In both cases, you should calibrate your meter and probe with both a pH4 and pH7 calibration solution prior to taking your readings to ensure the accuracy of your readings. 

Sper Scientific offers several pH meters and pH pens that can be used to test the pH of your sushi rice.  The pH meters can be purchased for as little at $77 and the spear tipped probe costs $83.  The pH pens start at $37.  Below are links to a few of our meters, pens, and to the Spear Tipper probe.


840087– Basic pH Meter

850055– Advanced pH Meter

850057K– AquaShock (Water and shock proof) pH meter

840049– Spear Tipped Probe

850050– Large Display pH Pen

850051– Large Display ATC (Automatic Temperature Compensation) pH Pen

Water Quality Meter Consolidates Multi-Parameter Water Testing into a Single Device

The Sper Scientific Water Quality Meter Model 850081 uses interchangeable probes to read pH, mV, conductivity, TDS, DO, temperature and ORP, diminishing the need for multiple devices dedicated to testing limited parameters. The user can order probes for only the parameters currently required, and add additional probes in the future. Intelligent probes electronically retain calibration information. No recalibration is required when changing probes.

The display simultaneously reads temperature in user selectable °C & °F, and all measurements are automatically temperature compensated. RS232 port enables communication with a computer. Also features auto power off, hold, min/max, fold-out easel back and a tripod screw. Comes with 9V battery and a hard-shell, foam-lined carrying case with room for one or two probes.

The Sper Scientific Water Quality Meter is ideal for field or plant use in a municipal drinking water or waste-water setting, and is available direct from the manufacturer at SperDirect.com