Tag Archive | "laboratory cleaning"

Lab Test Tubes

Minimum Detergent Concentration?

My question is related to a minimum detergent concentration.  We manually wash labware of all sizes in 0.3% Liquinox solution. We also pre-wash or pre-rinse the labware and control our parts load.  We rarely have failures. We want to change our protocol to extend the wash water use for one day instead of based on a numerical parts load.  Do you think a 0.3% Liquinox concentration is sufficient detergent capacity to go an entire day?

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Posted in Laboratory, Liquinox, Manual Lab CleaningComments (0)

Residue Testing with pH Strips

Q. Can I use pH paper to confirm cleaning and rinsing of labware to comply with lab accreditation requirements?

A. If you are going to use pH strips to comply with lab accreditation requirements, you need to verify that your detergents are not interfering with the strips and papers. Detergents and surface active agents can interfere with some pH paper by causing a decrease of several pH units in reading. Please test any pH paper you intend to use …

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Posted in Detergents, Environmental, Healthcare, Laboratory, Medical Device, PharmaceuticalComments Off on Residue Testing with pH Strips

Cleaning Glass Slides for Silane Coating

Q. I am developing a new cleaning process to replace the process we are using for cleaning glass slides before applying Silane coating. We are using strong acid to clean glass slides. I want to use a process where I first use basic aqueous solution, then use DI water to rinse, followed by acidic solution to chelate away metal ions. Then we’ll do DI water rinse, air dry, and finally use oxygen plasma to final clean the glass slide. What acidic aqueous solution and basic aqueous solution can you suggest?

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Posted in Citrajet, Citranox, Detojet, Liquinox, Medical DeviceComments (0)

Lab Glassware

Removing Trace Contaminants of Phenol

Q. We are attempting to validate our glassware washing process and found trace contaminants of phenol remaining after the washing process. Is there another detergent that is able to remove phenol better then Liquinox®?

A. In general, for manual cleaning, Liquinox® should be an excellent choice for removal of phenol residues. For very low level trace analysis, additional rinsing may be required. For routine laboratory cleaning, a triple rinse is typically used. For trace analysis, a 6 time rinse with purified water is typically used. For extreme low level trace analysis . . .

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Posted in Liquinox, Manual Lab Cleaning, Pharmaceutical, ValidationComments (0)

Cleaning Laboratory Glassware by Soaking

Q. Some of our glassware was left soaking in Alconox or Alconox and then bleach for a long period of time. Is this okay? A. Laboratory glassware that is completely submerged in an Alconox® solution is generally ok even with extended soaking. However, if you leave the laboratory glassware partially submerged…

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Posted in Alconox, Laboratory, Manual Lab CleaningComments (0)

Removing Trace Metals, Inorganics & Organics without Acid?

Q. We are trying to reanalyze our cleaning procedure. Do you have a product that removes trace metals, inorganics and organics without an additional acid rinse? We sample waste water influent and effluent and collect in plastic containers. Please let me know what you would recommend.
A. Organic residues are typically effectively removed by alkaline cleaning. The most robust way to remove trace metals and inorganics is to use an acid rinse. However . . .

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Posted in Alconox, Environmental, Liquinox, Manual Lab CleaningComments (0)

Alconox Powder Vs. Alcotabs Detergent

Alcotabs® Tablet Pipet Detergent is a tablet that is designed to effervesce and give time release flotation and detergent cleaning in a siphon pipet washer. Alcotabs detergent dissolve to a pH near 7, starting out acidic and the pH rises as the effervescence slows down and eventually stops. The tablets contain anionic surfactants, phosphates, carbonates and organic acids.

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Posted in Alconox, Alcotabs, Laboratory, Manual Lab CleaningComments (0)

Lab Glassware

Labware Cleaning: Solujet Leaving Ring

Q. It appears that the Solujet is leaving a ring on some of the labware that cannot be removed. What is this ring (sodium silicate?)? How do we remove it? The labware has not been completely submerged. We have just added the Solujet soak for some labware that may have stubborn organics. We have been giving the labware a 4 hour soak in 1% Solujet, followed by warm tap water rinse then wash with Liquinox followed by 3x DI rinse.

Click for the Answer.

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Posted in Laboratory, Liquinox, Manual Lab Cleaning, SolujetComments (0)

Bleach with Detergents for Disinfection?

Adding bleach to Alconox and Liquinox detergents can be done to enhance the disinfecting and oxidizing properties of these cleaners. Adding oxidizing does bring one more cleaning mechanism to the cleaning process which can be helpful if you are trying to clean dyes, pigments, heavy burned on organic residues and other residues that are labile to oxidation. You can get some disinfection, but as we will explain, you need to clean a surface first before you disinfect.

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Posted in Alcojet, Alconox, Alcotabs, Citrajet, Citranox, Detergent 8, Detojet, Laboratory, Liquinox, Solujet, Tergajet, TergazymeComments (0)

What Detergent for Biochemistry Lab Cleaning?

Q. What cleaners are recommended for general biochemistry laboratory? A. We recommend different Alconox detergents depending on the lab cleaning being performed. Liquinox for soak cleaning & pipets, Tergazyme for tissue/blood…

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Posted in Alcotabs, Liquinox, Manual Lab Cleaning, TergazymeComments (0)