Non-Metals Testing
Midwest Microlab is capable of testing solid or liquid samples for the total percentage of Oxygen, Phosphorus, and Sulfur. Please refer to the individual elements of Oxygen (O), Phosphorus (P), and Sulfur (S), to the right, for more specific details associated with each Non-Metals Analysis Techniques, Sample Size, and Interferences. Air Sensitive/ Glove Box handling IS available for Oxygen Analysis only from the Non-Metals testing.
Non-Metals Testing
Oxygen Testing
Phosphorus Testing
Sulfur Testing
Oxygen, Phosphorus, and Sulfur Testing
Non- Metals Testing Additional Information
Interferences Associated with Non-MetalsTesting:
Oxygen interferences include : All oxidizing metals, F, K, Mo, P, Se and Si.
Phosphorus interferences include: transition metals, Co, Cr, Fe, I, Ru, Si, SiO2 , Sn, V and Zr.
Sulfur interferences include: Cu, F, I, Na, P, Se, and Sn.
Please note the interferences above cannot be circumvented during analysis. Irregular results can be reported due to an interference within the molecular formula of the sample. Please note irregular results due to interferences cannot be interpreted by the chemists. Midwest Microlab chemists will perform requested analysis and report results as found with the understanding that the submitter understood the interferences associated and how it may affect results. Please indicate all elements or the molecular formula on the submission form.
Suggested Sample Size according to Total Percentage Theory:
Halogen 0-5 % Single 5-20% Single Above 20% Single
Oxygen 20 mg 15 mg 10 mg
Phosphorus 15 mg 10 mg 5 mg
Sulfur 30 mg 25 mg 10 mg
Halogen 0-5 % Duplicate 5-20% Duplicate Above 20% Duplicate
Oxygen 40 mg 30 mg 20 mg
Phosphorus 30 mg 20 mg 10 mg
Sulfur 60 mg 50 mg 20 mg
Halogen 0-5 % Triplicate 5-20% Triplicate Above 20% Triplicate
Oxygen 60 mg 45 mg 30 mg
Phosphorus 45 mg 30 mg 15 mg
Sulfur 90 mg 75 mg 30 mg
For Air Sensitive/ Glove Box handling requesting Oxygen analysis a minimum of 5 mg per single run.
Procedural Techniques
For more information on Oxygen Analysis including Techniques, Interferences and Sample Size please refer to the following link: oxygen testing
For more information on Phosphorus Analysis including Techniques, Interferences and Sample Size please refer to the following link: Phosphorus testing
For more information on Sulfur Analysis including Techniques, Interferences and Sample Size please refer to the following link: Sulfur testing
Results Availability
Turnaround Time / Rush Services: Midwest Microlab operates by a first-in first-out service / FIFO. Most services provided at Midwest Microlab, including Sulfur analysis, has a turnaround time of approx. 3-4 business days. With the exception of Oxygen and Phosphorus analysis is within 4-5 business day turnaround time. Rush analysis is available for all services provided at Midwest Microlab for an additional fee, per sample, per run, per analysis basis. Samples requesting Rush service will be processed ahead of all other samples received, including samples previously received prior to RUSH samples. CHN Rush services requested are within a 2-business day turnaround. Please note due to the length of the procedure Oxygen, Iodine and Phosphorus Rush is a 3-4 business day turnaround. Please note Midwest Microlab is closed on all Federal Holidays and weekends.
Shipment Information
Purchase Order (PO#) / Personalized Quote: If sending from a university or a company that requires a PO listed on the Invoice for payment, a PO# must be made available to Midwest Microlab prior to sending the results of the sample shipment to the submitter. Delay in receiving results could be due to incomplete submission forms, missing purchase order (PO#) or payment information not received. For Invoice payment purposes, a hard copy of the PO#, if available, should be shipped with the samples for fastest turnaround time. If a PO# is not available prior to shipment, please send an email to info@midwestlab.com, with a PDF version of the PO#. If you need a personalized quote for the purpose of requesting a PO, please click on the following link: Midwest Microlab Personalized Quote.
Shipment: Please click on the following link for 2026 Price List for additional services such as rush fees/ drying fees/ and return shipment fees. The new submission forms are editable online: Midwest Microlab Submission Form. Please print and include 1 completed submission form PER sample in your shipment. The shipping address can be found below, which can also be found in the lower left-hand corner of the submission form. For air stable sample containers, we usually see 10 ml screw cap glass vials. Please include the submitter Theory Total % per element analysis requested and Molecular formula (list of elements) if known on the Midwest Microlab Submission Form. This information will provide critical details for the chemists to determine if there are possible interferences within the sample to perform analysis or if the sample needs additional additives for complete combustion.
Air Sensitive Sample Shipment: For Oxygen analysis requesting glove box handling and is considered air sensitive, small glass ampoules or compression sealed vials are the best ways to send air sensitive samples. This helps to eliminate any degradation in transit. Samples that are only slightly oxygen sensitive, can give good results when sealed tightly in screw cap vials. For these a second sealed outer vial should be included. Please do NOT have the vials sealed with wax, as wax will damage the gloves within the glove box. If samples are received with was sealant, the wax will be removed outside of the glovebox and possibly exposing the samples to outside environmental conditions. As with all analysis, samples MUST be highly purified or homogenous to achieve good results. Samples that are suspected to be heterogenous, not pure, should be requested to perform in duplicate analysis. Return shipment is not available for Air Sensitive samples.
You may send your samples to the following address:
Midwest Microlab
Attn: Receiving Dept.
7212 North Shadeland Ave.
Suite # 110
Indianapolis, IN 46250
Phone: (317) 849-6606
Email: info@midwestlab.com
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info@midwestlab.com
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7212 North Shadeland Ave
Suite #110
Indianapolis, IN 46250
Office Number: (317) 849-6606
Fax Number: (317) 849-8534
Monday - Friday
9am - 5pm